Definite integral solved with must know basic techniques

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  • čas přidán 24. 05. 2024
  • (Mis-703)
    Integrate sqrt(2x)ln(x + 1)dx from 0 to 1
    #calculus #definite_integrals #substitution #algebraic #manipulation #integration_by_parts #cipher

Komentáře • 15

  • @slavinojunepri7648
    @slavinojunepri7648 Před 22 dny

    Excellent

  • @hduf1895
    @hduf1895 Před 22 dny +2

    Hi sir any idea [math] \int_0^\infty \frac{\tan x \sin x d x}{\tan x \sin x+(x \cot x+1)^2}[/math]?

  • @divyaanshu123
    @divyaanshu123 Před 22 dny

    Good question, i got exact solution but using diagamma function

    • @cipherunity
      @cipherunity  Před 22 dny

      If you provide your solution we can make a new video in your name.

    • @divyaanshu123
      @divyaanshu123 Před 22 dny

      @@cipherunity All i did was to taylor expand the log(x+1), integrating which we get an anwer that can be written as diff of 2 alternating inf series, one of which will be log2 and other will be diff of 2 diagamma. My answer comes (sqrt(2)/3)[log4-digamma(5/4)+digamma(7/4)]

    • @cipherunity
      @cipherunity  Před 22 dny

      @@divyaanshu123 I shall see to it

    • @cipherunity
      @cipherunity  Před 22 dny

      @@divyaanshu123 Every step is clear. Except the digamma part. Can you put some more light on it.

    • @divyaanshu123
      @divyaanshu123 Před 21 dnem

      @@cipherunity 2nd alternating inf series would be sum[(-1)^n+1/(n+ 3/2)] that can be written as difference of 2 inf series sum(1/(5/2 + 2n)) - sum(1/(7/2 + 2n) which equates to (1/2)(digamma(5/4) - digamma(7/4))