Inequalities 3 | CAT Preparation 2024 | Algebra | Quantitative Aptitude

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  • čas přidán 11. 04. 2019
  • Advance Algebra by Ravi Prakash | Quantitative Aptitude for CAT 2024
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Komentáře • 59

  • @aahistachirps
    @aahistachirps Před 3 lety +4

    Thank you so much, sir. This video has cleared all my doubts and your methods are much easier than the conventional methods of AM and GM.

  • @harshalxd7533
    @harshalxd7533 Před rokem +1

    Super level of Questions to raise the thinking bar ! thank you for such videos!

  • @binnapaul2126
    @binnapaul2126 Před 2 lety +16

    Sir, I have been following your content for some time now and I have to say there are so many concepts taught here that can't be found anywhere else which makes solving questions so much easier and faster. Thank you so much sir. Also a humble request, please do upload videos on pipes and cisterns back again.

    • @Rodha
      @Rodha  Před 2 lety +3

      Never deleted

  • @phoenixcrew6045
    @phoenixcrew6045 Před 10 měsíci

    RAVI SIR YOU ARE A GEM OF PERSON NEVER HAD A TEACHER LIKE YOU BEFORE ........ SIMPLY THE BEST!!!!!!! THANK YOU VERY MUCH😍

  • @yashasharma9963
    @yashasharma9963 Před 3 lety +16

    Great level of thinking + great level of explaining that thinking = Rodha.

  • @vineetichake5014
    @vineetichake5014 Před rokem

    The great Ravi sir!

  • @ayushisingh1471
    @ayushisingh1471 Před 10 měsíci

    Awesome Content .......Thankyou Sir.

  • @prithasingh6254
    @prithasingh6254 Před rokem +1

    The first question was easily solvable by linear equations.

  • @ksaikiran1781
    @ksaikiran1781 Před 4 lety +8

    i donno why but directly applying AM-GM concept is far more satisfying and less time consuming than the traditional method discussed above

    • @devashish4690
      @devashish4690 Před 4 lety +3

      true..wanted to just crosscheck if at 7:00 the answer should be 3^9?
      please acknowledge

    • @bhaskarmaniraj
      @bhaskarmaniraj Před 3 lety

      @@devashish4690 Yes, even i got the same answer through am and gm method.

    • @Rodha
      @Rodha  Před 3 lety +6

      @@devashish4690 no. Right answer is 3^10

    • @jaiganeshbaskar9888
      @jaiganeshbaskar9888 Před rokem

      @@devashish4690 The value that you got is the maximum value of (x^2.y^3.z^4) by AM-GM method but in the question they asked the maximum value of (x^4.y^2.z^3) so for this case using AM-GM method will not fetch you the result.

    • @sujalsonkar1657
      @sujalsonkar1657 Před 2 měsíci

      will you please explain how ?

  • @Daredavil_298
    @Daredavil_298 Před 6 měsíci +1

    Super content sir👍🙏🙏

  • @vinaykapil1413
    @vinaykapil1413 Před 2 lety +1

    Sir, a humble request, please do upload videos on coordinate geo back again.

  • @swapnil5162
    @swapnil5162 Před rokem +1

    Great 👍 sir

  • @PratyushAtghara266
    @PratyushAtghara266 Před měsícem

    interesting topic, well explained👏

  • @kunalmjain
    @kunalmjain Před 4 lety +1

    Sir can we take ratio of x y z and then solve eqn

  • @nidhiyadav8903
    @nidhiyadav8903 Před rokem

    Thanks a ton sir🌼

  • @muskantiwary606
    @muskantiwary606 Před 3 lety

    How can u identify the no. Is maximum or minimum? In 7th question, 2 is minimum and -2 is maximum .
    How please explain

  • @tanmaydey3008
    @tanmaydey3008 Před 2 lety

    Thank You Sir

  • @arimachezhian8631
    @arimachezhian8631 Před 11 měsíci

    Since it was never mentioned but both x and y to be positive in the first question. Can't we just assume a big value of negative x and corresposing y and yield Infinity as an answer

  • @Shivam_General_Fitness

    Thanku sir

  • @happy_bolta_hai
    @happy_bolta_hai Před rokem

    Sir in first question... Cant X be -15 and Y be 15 as 2(-15)+3(15) = 45 and (-15)² + (15)³ = Maximum Value of x²y³.

  • @aashita203
    @aashita203 Před 10 měsíci +1

    Legend🤩

  • @AbhishekKumar-kl9ug
    @AbhishekKumar-kl9ug Před 3 lety +1

    @ 7:03 ques, shouldn't the values of x:y:z (max) be 24:8:9 got it by the traditional method we did in prev ques to this one and eventually we'll be getting largest value (24)^4(8)^2(9)^3. @Rodha sir plz correct me if I'm making an error.

    • @avijanpaul9367
      @avijanpaul9367 Před 11 měsíci

      Well it’s just the ratio not the real answer to the question

  • @adityajain1984
    @adityajain1984 Před 26 dny

    at 17:41, min can be 0, if we put a=-1

  • @debdipdutta3953
    @debdipdutta3953 Před 6 měsíci

    this is the second lecture in inequalities🤗

  • @neelammaurya8970
    @neelammaurya8970 Před 4 lety +1

    in frst ques.if we keep close value as x=7, and y=8 then we'll get maximum value....y don't this to be done

    • @DhanushAdns
      @DhanushAdns Před 3 lety

      Then the value of 2x+3y would be 2(7) + 3(8) = 38

  • @devarshpanchal9743
    @devarshpanchal9743 Před 3 lety +1

    Sir how is it possible that number and its reciprocal sum is =2 ifi take 100+1/100 then it is more than 100 how can it be 2 ?

    • @swapneelrao8276
      @swapneelrao8276 Před 3 lety +1

      Bro, read the questions carefully. Here he never said the value is 2. The "minimum value" is 2.

    • @Rodha
      @Rodha  Před 3 lety +3

      Min value is 2

  • @anoshirani5682
    @anoshirani5682 Před 10 měsíci

    The 1st question is for maximum and 3rd question is for minimum, but we use the same rule for both. How is that possible?

    • @kronikevaporation6007
      @kronikevaporation6007 Před 10 měsíci

      Look intently. 1st question is asking for product and 3rd is asking for sum. It's maximum for product and minimum for sum.

  • @bhaskarmaniraj
    @bhaskarmaniraj Před 3 lety +1

    @9:15 I got the answer as 9. through am and gm method.

    • @priyabratanayak4359
      @priyabratanayak4359 Před 3 lety

      Bro can you explain the am and gm method or share some link where i can find those!!

    • @bhaskarmaniraj
      @bhaskarmaniraj Před 3 lety

      @@priyabratanayak4359 You can learn it from Takshzila CZcams channel.

    • @bond-hn4wd
      @bond-hn4wd Před 3 lety

      @@bhaskarmaniraj but its not full, we can still get problem with the fact the if we got maximum of addition and minimum of multiplication, then we have to rely on his teaching.

    • @ankitsharma-pf3zx
      @ankitsharma-pf3zx Před 3 lety

      u did calculation mistake... in gm part u have to write product as [(2x/4)^4][(3y/2)^2][(4y/3)^3] ..now u will get right

  • @KlutchyRex
    @KlutchyRex Před 22 dny

    sir se ek sec phele answer likh kar khush hota hua main

  • @TarunAsthana
    @TarunAsthana Před 2 měsíci

    Is there any formula for (AB)min. When A+B=constant ?

    • @AbyjithK
      @AbyjithK Před 2 měsíci

      Take A=1 and B= n-1 if A+B=n
      This will give the min value

  • @vibhavadhikari8013
    @vibhavadhikari8013 Před 3 lety

    2:29 Max value of (x^2).(y^3) is not 243 but infinity. For instance, x=-3, y=7, satisfy the equation 2x+3y=15, thus making (x^2).(y^3)=3087, which is greater than 243... Keeping reducing the value of x by 3 and y by 2 indefinitely, thus x approaches negative infinity and y positive infinity, thereby making the answer as infinity...

  • @vibhavadhikari8013
    @vibhavadhikari8013 Před 3 lety

    17:37 Error... Minimum value of expression is not 64, but 0. Put a=b=c=-1.

    • @Rodha
      @Rodha  Před 3 lety +6

      1st read the main statement Question at 12:22. a,b,c,d are positive real numbers. Already given.

  • @pradipto_de
    @pradipto_de Před rokem +3

    @6:15 it should be (3 raised to 9)

  • @shishir6340
    @shishir6340 Před 4 lety

    2x+3y+4z=27 . solution is wrong. if we calculate x,y,z by normal method we get the values as x=8, y=8/3,z=3. this gives the maximum value as : 786432. but if we put your values to get maximum we get a smaller number than this.

    • @avinashbajpai7091
      @avinashbajpai7091 Před 4 lety +4

      Bro it's (2)x + (3)y +(4)z =27 . So if we put your values the sum will exceed the constant value of 27.

    • @akshat9282
      @akshat9282 Před 3 lety

      according to your values for x, y, z; the initial equation of 2x+3y+4z=27 is not satisfied