Video není dostupné.
Omlouváme se.

Logarithm Class 11 | One Shot | JEE Main & Advanced | Arvind Kalia Sir

Sdílet
Vložit
  • čas přidán 7. 08. 2024
  • Best Logarithm One shot session for JEE by Arvind Kalia Sir
    ----------------------
    ➡️ PDF of the session:- drive.google.com/file/d/1fsq2...
    ➡️ FOR CLASS NOTES check the telegram channel t.me/JEEnexus
    ➡️ Quiz-o-Rama form link: forms.gle/7MyMXPePagezinoAA
    ---------------------------
    The teaching style of Arvind Kalia Sir is known for his clarity, concise explanations, and ability to make complex concepts accessible to students.
    In this one-shot video, Arvind Kalia Sir covers the topic of logarithms, which is an essential concept in mathematics and plays a significant role in mathematics. The video aims to simplify the complex concepts related to logarithms and make them easily understandable for the students.
    This session aims to provide Class 11 students with a solid foundation in logarithms and equip them with the necessary knowledge and problem-solving skills required to excel in the JEE Main and Advanced.
    ---------------------------
    Timestamps
    00:00 - Introduction
    01:50 - Nature of Chapter
    04:35 - Basics of Logarithms
    16:02 - Properties of Logarithms (Part 1)
    01:06:40 - Properties of Logarithms (Part 2)
    #jee2025 #jeemain2025 #jeeadvanced #jeeadvanced2025 #unacademy #jeenexus #arvindkaliasir #onlineclasses #jeemaths

Komentáře • 816

  • @JEEnexus
    @JEEnexus  Před rokem +144

    FOR CLASS NOTES & DPP check the telegram channel t.me/JEEnexus

  • @prajvalsripati1775
    @prajvalsripati1775 Před 2 měsíci +877

    Jee 2026 aspirants here?

    • @beestogaming4870
      @beestogaming4870 Před 2 měsíci +10

      Yess

    • @beestogaming4870
      @beestogaming4870 Před 2 měsíci +6

      Yess

    • @mannatmanjari7991
      @mannatmanjari7991 Před 2 měsíci

      Yesss

    • @chitranshsharma708
      @chitranshsharma708 Před 2 měsíci +30

      Bro if 2026 aspirant here please don't start depending on oneshots else you will ruin your prep do all chapters from full lectures from basics to advance level
      I am 2025 jee student that's why using oneshots because of less time but you have sufficient time then use lectures of goat teachers some are - mohit tyagi channel , maths unplugged channel, mathsmurizing, sachin sir pw

    • @beestogaming4870
      @beestogaming4870 Před 2 měsíci

      @@chitranshsharma708bro where can i get full lectures

  • @aboycaledaryan
    @aboycaledaryan Před 3 měsíci +669

    Log❌ backlog☑️

  • @harshrajjha5002
    @harshrajjha5002 Před 15 dny +12

    For all those who didn't understand how sir isolated x at 40:15
    We have,
    x•log3 = (x-1)•log4
    x•log3 = x•log4 - log4 (Distributing log4)
    x•log3 - x•log4 = -log4
    (Subtracting x•log4 from both sides)
    -x(log4-log3) = - log4
    (Taking x common)
    -x = (-log4)/(log4-log3)
    (Dividing both sides by log3-log4)
    x = (log4)/(log4-log3)
    (Multiplying both sides by -1)
    Hope it helps.

  • @SamayNichite_07
    @SamayNichite_07 Před měsícem +47

    PW walo attendance lagao 😂

  • @UsernameNotFound0007
    @UsernameNotFound0007 Před 4 měsíci +353

    Batch 2024-25 attendance here

  • @zebra2218
    @zebra2218 Před rokem +158

    he is looking more young in Unacadeny Vs Vedantu 😊All the best

    • @kaliaiit
      @kaliaiit Před rokem +34

      Iska raaz hai " hair colour" 😊😊😊..... ❤❤

    • @zebra2218
      @zebra2218 Před rokem +8

      ​@@kaliaiit sir ji....aap ne kamaal kar diya reply kar ke. unexpected. we know your color thing as you've already shared with us in the past but STILL overall your "Noor" has increased is what I mean 😊Wish you very best again 😊

    • @rishiyt69
      @rishiyt69 Před 2 měsíci

      Bhai pessa jyada milta h to aadmi javaan hojata haii 🤣

    • @DieuDeShinobi
      @DieuDeShinobi Před 2 měsíci

      ​Hamara bhai hai hi hero, Bollywood walo ko fail krde asli mogger🤫🧏

  • @kronpuff
    @kronpuff Před 4 měsíci +85

    1:45:00 there should be root 3 instead of root 2 in case anyone need help not pointing out the mistake

  • @khushihirwani300
    @khushihirwani300 Před 7 měsíci +122

    40:14
    xloga3=(x-1)loga4
    xloga3=xloga4-loga4
    xloga3-xloga4=-loga4
    -x(loga4-loga3)=-loga4
    x=loga4/(loga4-loga3)

  • @educatewithkabir3169
    @educatewithkabir3169 Před rokem +33

    Thankyou jee nexus by unacademy and arvind sir for giving amazing content .My concept about logarithm has become clear❤❤

  • @iitayush2048
    @iitayush2048 Před 11 měsíci +5

    Thank you sir for such a great lecture

  • @suhanisahay7262
    @suhanisahay7262 Před rokem +45

    We love you sir ❤ thank you , aapse best teacher maths ke liye aaj tk koi nhi mila, aap best ho 💛

    • @suhanisahay7262
      @suhanisahay7262 Před rokem

      @@KaranKumar-yu4ih yaar inse accha koi nhi padha skta he's best

    • @suhanisahay7262
      @suhanisahay7262 Před rokem

      @@KaranKumar-yu4ih he teachers in English, better hota agar hinglish me padhate to

    • @suhanisahay7262
      @suhanisahay7262 Před rokem

      @@KaranKumar-yu4ih already mai Sachin sir pw or arvind sir se padh rhi hu, bss bhut h

    • @suhanisahay7262
      @suhanisahay7262 Před rokem

      @@KaranKumar-yu4ih haa , aajkal sab available online hi

    • @Amine-t6f
      @Amine-t6f Před rokem

      Lgta hai abhi aap log legendary subham sir se nhi mile ho he is a very youngest and best maths teacher and no ine like him and no one can beat him ..
      If you eant ti try search sumeetup you will find out who is he ..

  • @vaijayanthikadambi4692
    @vaijayanthikadambi4692 Před rokem +13

    Sir what is the schedule for maths sessions and sir when will physics sessions start?

  • @aspirant4810
    @aspirant4810 Před 2 měsíci +11

    59:36 You can't take log3 base x as t when you have already assigned it the value x= logx base a

    • @Kaushik_here11
      @Kaushik_here11 Před 2 měsíci

      is that correct or not?

    • @wlgenius3141
      @wlgenius3141 Před 2 měsíci

      ​@@Kaushik_here11 It's correct brother to multiply the entities we need to take the base as three otherwise we won't be able to continue with the solution hope it helped

  • @krunaldevi4066
    @krunaldevi4066 Před 4 měsíci +3

    Sir ,Time 1hr 05 minute kya hum hcf leke bhi (p+q+r) ki value nikal sakte the?

  • @prarthanadubey-vp1hd
    @prarthanadubey-vp1hd Před 4 měsíci +9

    1:46:12 it should be root 3 not root 2

  • @radhashyamsundar_
    @radhashyamsundar_ Před rokem +49

    hare krsna bhai
    everyone knows maths is the most toughest subject in JEE aapke one shots bhot help kr rhe hai 11th backlog ke liye bas ek request hai ki please please please one shot ki vjh se lecture chota mt rkho chahe 1-2 hours extra extend krdo video lekin ekdum advance level tk ques practice krwa do jee valo ne maths ka level bhot bdha diya hai please usko dhyan me rkhte hue one shots do 8 hrs tk ke one shots bhi de do ham pdh lenge bas high level ques krwao advance level tk

  • @GamingMB001
    @GamingMB001 Před měsícem +2

    50:58 Sir maine alag approach lagayi
    First i converter log27 to the base 3 in 3log3 to the base 3...
    then log3 to the base 3 becomes 1 and 2 + 3 = 5 then finally i converted logarithmic equation to exponential and it became
    3^5=(4x+7)

  • @ParthManchanda
    @ParthManchanda Před měsícem

    1:06:04 we could also take a fraction of all (two equations at a time) then calculate p and r in form of q and compare to any one of the equations and calculate p,q,r

  • @vikram_singh005
    @vikram_singh005 Před rokem +279

    Aap thodi unacademy ki t shirt mein different lagte ho but dheere dheere is t shirt se bhi feelings connect ho jayengi

    • @Feel2u7
      @Feel2u7 Před rokem +25

      Sir ne vedantu ko leave kar Diya kya....??🥺

    • @Sky_infy
      @Sky_infy Před rokem +11

      Sachi Bhai mujhe bhi ajeeb lagta hai😂

    • @dangergaming8550
      @dangergaming8550 Před rokem +9

      Bhai par unacadmy ki tshirt mein sai hai vedantu se

    • @raghavv172
      @raghavv172 Před rokem +6

      Lekin peeche board mai vedantu bhi dikhai de rha hai top mai right side

    • @omsain8326
      @omsain8326 Před rokem +6

      Paise ka chakar Babu bhaiya paise ka chakkar

  • @user-mm4gi7wp5o
    @user-mm4gi7wp5o Před 11 měsíci +13

    Baap re baap kya heavy padha rhe hai sir...Dil dimmag sb khul gaya..Majaa aa gaya....Sir aap problem solving sessions Lao na plz..Ye 11th aur 12 th ke concepts Mila ke...

  • @Future_iitian_
    @Future_iitian_ Před rokem +28

    1:25:51 for those students who were not able to do
    Log b/log a^n = let base be be a^n
    Then log a^n b / 1
    So log a^n b
    Now by second deduction
    1/log b a^n
    1/n * 1/log b a
    1/n * log a b

    • @Ddragonemperor5606
      @Ddragonemperor5606 Před 10 měsíci

      It's very helpful for other ❤❤❤

    • @Future_iitian_
      @Future_iitian_ Před 10 měsíci +1

      ​@@Ddragonemperor5606helpful for others but now I forgot what I was trying to say 😭😭😭😭

    • @ashwanisamyak
      @ashwanisamyak Před 8 měsíci

      ​@@Future_iitian_😂

    • @padmammagovindappa
      @padmammagovindappa Před měsícem

      Bro your playlist is helpful. Btw which nit are you attending right now?

    • @Future_iitian_
      @Future_iitian_ Před měsícem

      @@padmammagovindappa counseling baaki he , most probably warangal milegi

  • @ArnavBhogale
    @ArnavBhogale Před měsícem +1

    thankyou sirrr for such a good lecture , getting all concepts more clear ❣❣❣

  • @9.ch.tanishq655
    @9.ch.tanishq655 Před měsícem +3

    57:23 Sir why is the answer wrong when done like this:
    X^(log x^2+(log x)^2-10)=x^-2
    log x^2+(log x)^2-10=-2
    Let log x be a
    a^2+2a-8=0
    And after solving this we get a=-4,2
    And from here x is 9 and 1/81

  • @ALIENHUANYPROBLEM
    @ALIENHUANYPROBLEM Před rokem +1

    THANXX A LOT SIRJI

  • @kunalgr_30
    @kunalgr_30 Před měsícem

    Thank you so much for wonderful session sir
    I was afraid of this chapter, but after this session I have got so much confidence.

  • @Thunder_IITian
    @Thunder_IITian Před rokem +6

    sir please a lecture on co_ordinate geo
    its weightage is quite high

  • @ishanaryan3177
    @ishanaryan3177 Před 5 měsíci +61

    1 like = 1 less 8-9th student yapping in the comments

  • @arun_kumar_rout
    @arun_kumar_rout Před 6 měsíci +1

    Thank you sir ❤

  • @Meraperspective
    @Meraperspective Před 6 měsíci

    Will this video help me as I am preparing for mca?

  • @Itsverynice3
    @Itsverynice3 Před 10 měsíci +1

    Samajh agaya sir❤❤❤

  • @practicalvasim7655
    @practicalvasim7655 Před měsícem +5

    25:36 sir look like berlin

  • @sido157
    @sido157 Před měsícem

    Incredible hardwork.
    Appreciate it.

  • @RajkumarYadav-iu4fc
    @RajkumarYadav-iu4fc Před 26 dny +2

    Thank you sir it was very helpful 😁
    I am in class 10 and it has applications in chemistry and physics of class 10 foundation course

  • @jee1.0
    @jee1.0 Před 9 měsíci +1

    Love you sir ❤❤❤
    Very very very nice👏👍❤🎉
    I like your teaching style
    🎉god bless 🙏you sir
    Once again love you sir❤

  • @nishantniboriya
    @nishantniboriya Před 5 měsíci +1

    thank you sir
    🤗🤗

  • @sajadansari648
    @sajadansari648 Před rokem +3

    Sir Aapne full fill la Diye log ka thanks u so much Basis se lakar Advanced tak ka # mera bhai mera bhai

    • @Amine-t6f
      @Amine-t6f Před rokem

      Nhi bhai ye advance level tq nhi tha jee mains level tha subham sir ne liya hai advanced level ka content search sumeetup then you realize that it is low lable ..

  • @_shreeseshan_
    @_shreeseshan_ Před 4 měsíci

    Sir aaap hamare jaise lecture ko phod diya....kya maja se padhathe ho aap....❤❤❤ thankyou

  • @enror5161
    @enror5161 Před rokem +15

    1:49:36 sir mistake waha root 2 nahi root 3 hoga 🙂

  • @Khushwant-lz2jn
    @Khushwant-lz2jn Před 2 měsíci +11

    Surprisingly this lecture is not boring at all😊

  • @SohitKumar-bj8hp
    @SohitKumar-bj8hp Před rokem +6

    Sir I even think that, I don't know about this new channel, I know this because of recommendation. Since, I used to learn maths from vedantu PCM playlist.
    Thank u sir for your love❤

  • @RCPPratap01
    @RCPPratap01 Před rokem +3

    Sir hame online se bahar pahli baar Patna me aapko dekhne ka mauka Mila ❤hum khushi se jhum uthe the🎉❤❤❤❤

  • @ayushsingh479
    @ayushsingh479 Před 4 měsíci

    1:00:29 pr sir x-2 ko samne Wale ki power se compare nhi kr skte same ans aarha isse bhi bs 1 nhi aaraha
    Pls batadijiye

  • @uddeshyayadav7
    @uddeshyayadav7 Před 3 měsíci +3

    Nice explanation sir

  • @kronpuff
    @kronpuff Před 4 měsíci +3

    for the one who didn't get question on 40:00 please search that on doubtnut your doubt will be cleared #not_promoting

  • @hiteeshriii_
    @hiteeshriii_ Před měsícem

    BHAI MADE MATHEMATICS LIABLE TO UNDERSTAND THANK YOU SO MUCH!!!!! 💌

  • @OpHack-xd6tv
    @OpHack-xd6tv Před 2 měsíci +1

    Great lecture sir 👌

  • @Relatablestuffings
    @Relatablestuffings Před 3 měsíci +7

    Sir bas un students kai liye ache hey jou already smart or basics mey well and good hain... 🙂

  • @KEDARYADAV10344
    @KEDARYADAV10344 Před 2 měsíci +1

    Great teacher of maths love you sir ❤😊

  • @Krishstudies
    @Krishstudies Před 3 měsíci +1

    Most welcome

  • @anugupta-mb4zq
    @anugupta-mb4zq Před 3 měsíci

    1.46.20 me aapne 3-✓6 ko ✓3-✓2 se divide kiya aur ✓2 nikala
    Par divide karne par to ✓3 aayega naa
    Please agar mai galat bol rhai hu to explain kar do

  • @user-cy6zj5yw4n
    @user-cy6zj5yw4n Před 8 měsíci +6

    1:46:21 error
    It cancels to become root 3 and not root 2

  • @Jeeaspirant870
    @Jeeaspirant870 Před rokem +1

    Sir loved the lecture
    But 1 question
    I am in 11class 1 shot dekhne se sara chapter cover ho jaega?

  • @yaseenmirza1517
    @yaseenmirza1517 Před 3 měsíci +1

    50:37 sir but iss jagah we can take log3 27 as 3 log 3.3....so 3 log 3.3will give 3+2 =log3(4x+7)........phir 3^5=4x+7?????

    • @trinityyy26
      @trinityyy26 Před 2 měsíci

      bhai maine bhi same kiya ans 59 aagya

  • @tarunkrishnamahajan3210
    @tarunkrishnamahajan3210 Před 7 měsíci +12

    I love how sir respects every student❤

  • @sonimishra588
    @sonimishra588 Před 2 měsíci

    Thank you so much sir ❤❤❤

  • @ritvikkumar8957
    @ritvikkumar8957 Před 2 měsíci +1

    😊😊😊 thank you❤🙏

  • @user-jf4ei8dv9b
    @user-jf4ei8dv9b Před 3 měsíci

    Thanku sir ❤ aap kisi bhi platform par padhao aap hamesha hamare favourite rahoge.

  • @mdkohinooralam3075
    @mdkohinooralam3075 Před rokem +3

    Sir please bring ioqm series sir we want to learn from you only

  • @sulphonicacid
    @sulphonicacid Před rokem

    thankyou sir

  • @dhirajkumarsharma8170
    @dhirajkumarsharma8170 Před 2 měsíci +1

    Thank you

  • @Rk-nj4se
    @Rk-nj4se Před 3 měsíci

    Thanks sir ❤

  • @Bhomik2
    @Bhomik2 Před měsícem

    Cant we apply base change formula at 1:26:31 ?

  • @satombff6010
    @satombff6010 Před 2 měsíci

    Applied maths wale ye video dekh sakte hain kya?

  • @Malik11-ie9ro
    @Malik11-ie9ro Před měsícem +2

    11:22
    Sir cussed the log😂❤...

  • @user-fl9yw5vb3n
    @user-fl9yw5vb3n Před 5 měsíci

    Sir kaise hoga 1/2 app to neeche wala no, devide hi nai krre to kaise hoga ans shi

  • @marvelhq5241
    @marvelhq5241 Před rokem

    Sir Logarithmic inequalities isme cover nhi kiya apne?

  • @sandeshupadhyay1488
    @sandeshupadhyay1488 Před rokem +2

    Sir please limits and derivatives ka bhi one shot session le aaye pls

  • @Aalif05
    @Aalif05 Před 4 měsíci +1

    i am from Bangladesh sir thx for this class now logarithm is clear for me

  • @AnkushKumar-dx9dw
    @AnkushKumar-dx9dw Před 9 měsíci +2

    first time i saw u sir , love u.Ur way of teaching is very comforting to students

  • @Sose_TO_IIT
    @Sose_TO_IIT Před 4 měsíci +2

    In questions 3^x=4^x-1, then x =
    Isme x log↓a3 = (x-1)loga↓4
    Me next step samjh nhi aaya sir
    Please help me

  • @idkedits84
    @idkedits84 Před 6 měsíci

    Thanks sir

  • @arkapallymanju9189
    @arkapallymanju9189 Před rokem +1

    yes sir

  • @agentheroop
    @agentheroop Před 5 měsíci

    Sir ye question me logic bhi lag raha
    Jaise p(p+q+r) = 48
    q(___) = 12
    r(-------) = 84
    To kuch kuch ye 4 ke multiple lag rahe he answer me then p+q+r = 4
    Therefore p= 12 q= 3 and r= 21
    Please tell me am I right or wrong
    ©

  • @Cltro143
    @Cltro143 Před rokem

    More questions on logarithms please sir

  • @scihub5981
    @scihub5981 Před 26 dny

    Thank you sir ❤!

  • @venomkong551
    @venomkong551 Před 10 měsíci

    Sir is channel par physics k lectures v aaenge??

  • @starletforlanadelrey
    @starletforlanadelrey Před měsícem

    in 48:45 shouldn't a+b = 10 becuase according to the property we multiply 5x2..i did not understand how we took a+b as 1. sir pls tell

    • @swapnil1899
      @swapnil1899 Před měsícem

      Actually, a=log of 2 to the base 10 and b=log of 5 to the base 10 so according to the property, log 2 to the base + log 5 to the base 10= log of 10 to the base 10 which is 1. Therefore, a+b=1.
      Hope you understand!

  • @Riya-nm7hw
    @Riya-nm7hw Před 11 měsíci

    Sir is this useful for cat..? Plsss

  • @motivationalziddi9449
    @motivationalziddi9449 Před 2 měsíci

    Salute sir you are best teacher

  • @chessmaster215
    @chessmaster215 Před měsícem

    Bhaiya Doubt
    Log(x-2)^(x+3)=?
    Plz helppp me

  • @aestheticvibes9337
    @aestheticvibes9337 Před 2 měsíci +1

    What is the value of log 10 base 9

  • @SatyamKumar10749
    @SatyamKumar10749 Před 3 měsíci

    Sir log3base a sai kaise divide kiya karte hue nikal gsye concept aaya to

  • @vikalp_69.
    @vikalp_69. Před 11 měsíci +3

    45:30 whats what every student need~

  • @studyboy8248
    @studyboy8248 Před rokem +30

    Timestamps
    00:00 - Introduction
    01:50 - Nature of Chapter
    04:35 - Basics of Logarithms
    20:05 - Properties of Logarithms (Part 1)
    01:11:05 - Properties of Logarithms (Part 2)

  • @snehlatagupta7235
    @snehlatagupta7235 Před 10 měsíci +7

    sir 40:15 par x=log⁴a
    --------
    log⁴a-log³a
    Kaise aya samajh me nahi aaya😓😓

    • @DabluKumarSingh-wq6su
      @DabluKumarSingh-wq6su Před 10 měsíci +1

      Sir Mujhe bhi nahin aaya pls Bata dijiye 😢

    • @AbhaySingh-or5hx
      @AbhaySingh-or5hx Před 10 měsíci +4

      xlog3=(x-1)log4
      xlog3= xlog3-log4
      -log4= x(log3-log4)
      x = log4/log4-log3

    • @AyushKumar-zj9vc
      @AyushKumar-zj9vc Před 2 měsíci +1

      ​@@AbhaySingh-or5hx thik hai bhaiya but how you reached to step 2 from 1

  • @user-gw2oq3ps9b
    @user-gw2oq3ps9b Před rokem +9

    Good evening sir i am student of class 11 started prep for iit jee sir your oneshots of sets s log is very great sir can you also make oneshot or lecture on fundamentals of mathematics thankyou sir .

    • @prabhakar_1_8
      @prabhakar_1_8 Před 11 měsíci

      math me jyda pakad banana ho to masteer change krlo lo................

  • @indreshkumar83
    @indreshkumar83 Před 22 dny +1

    Thank u so much guru ji

  • @HimanshuGupta_22
    @HimanshuGupta_22 Před rokem +10

    OP OP OP ... believe me I'm 23 ... thank you for helping me learning maths again.... Arvind sir OP❤

  • @suhanisahay7262
    @suhanisahay7262 Před rokem +24

    Sir jab aapka vedantu pe goodbye dekha tab laga ki shayad aapse padhne ka mauka na mile aur iss wajah se mai udaas thi, but sir , aap hamare liye fir se best content lekar aaye ❤ thank uu sir

  • @starletforlanadelrey
    @starletforlanadelrey Před měsícem

    in 57:35 sir..dono side log liye bina bhi toh 2 jo power hai vo neeche aasakta toh alag se log liya kyu???

  • @7t2sm37
    @7t2sm37 Před 11 měsíci +5

    Best one shot on logarithm in whole CZcams 😊😊

  • @vibhajhabrightacademics3100
    @vibhajhabrightacademics3100 Před 7 měsíci +1

    1:46:13 par sir root3 aayega kat ke not root2

  • @ishusingh3189
    @ishusingh3189 Před rokem +2

    Sir relation and functions

  • @RajjevKr
    @RajjevKr Před 2 měsíci

    It is beneficial FOR IMO( international mathmatics Olympiad) 9th

  • @sonimishra588
    @sonimishra588 Před 2 měsíci

    Sir you are the best teacher of maths for JEE 🎉🎉🎉❤❤❤

  • @siddhanthpandey314
    @siddhanthpandey314 Před 11 měsíci +4

    Thank you so much sir for clearing my concept in logarithms. I am ready to give my best for preparation.

  • @Lakhankumar-i8l
    @Lakhankumar-i8l Před rokem +2

    Really great way of teaching sir

    • @Amine-t6f
      @Amine-t6f Před rokem

      Yes he is a very awesome teacher ..
      But for mathematics i specially follow sumeetup ..best online plateform for 11/12th and jee maths .

  • @Infinity-zy4rs
    @Infinity-zy4rs Před rokem +8

    Who's Shera ???

    • @anuragmondal
      @anuragmondal Před 2 měsíci

      Sir's common name for every student

  • @Tusharthakur-kz9vc
    @Tusharthakur-kz9vc Před 7 měsíci

    Sir notes kaha sai milegi iss lecture ki