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If int(xe^(x))/(sqrt(1+e^(x)))dx=f(x)sqr...

If `int(xe^(x))/(sqrt(1+e^(x)))dx=f(x)sqrt(1+e^(x))-2log|g(x)|+c`, then-

A

f(x)=x+1

B

`f(x)=2(x-2)`

C

`g(x)=(sqrt(1+e^(x))-1)/(sqrt(1+e^(x))+1)`

D

`g(x)=(sqrt(1+e^(x))+1)/(sqrt(1+e^(x))-1)`

Text Solution

Verified by Experts

The correct Answer is:
A,C
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Knowledge Check

  • If int (xe^x)/(sqrt(1 + e^x)) dx = f(x) sqrt(1 + e^x) - 2 In g(x) + c , then

    A
    f(x) = x - 1
    B
    g(x) =`(sqrt(1+e^x) - 1)/(sqrt(1 + e^x) + 1)`
    C
    g(x) =`(sqrt(1+e^x) + 1)/(sqrt(1 + e^x) - 1)`
    D
    f(x) = 2(x - 2)
  • int (e^x (1+x))/(cos^2(xe^x)) dx is

    A
    `tan(xe^x)` + c
    B
    `tan^-1 (xe^x)` + c
    C
    `sqrttan(xe^x) + c`
    D
    None of these
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