1.

The value of ` int(1+logx)/(sqrt((x^(x))^(2)-1))dx " is " `A. `sec^(-1)(x^(x))+c`B. `tan^(-1)(x^(x))+c`C. `log(x^(x)+sqrt(x^(2x)-1))+c`D. `cot^(-1)(x^(x))+c`

Answer» Correct Answer - A
`I=int(x^(x)(1+logx))/(x^(x)sqrt((x^(x))^(2)-1))dx `
` "Let " x^(x)=t`
` :. xlogx=log t `
` implies (logx+1)dx=(1)/(t)dt `
` implies x^(x)(1+logx)dx=dt `
` :. I=int(1)/(tsqrt(t^(2)-1))dt `
`=sec^(-1)(t)=sec^(-1)(x^(x))+C`


Discussion

No Comment Found

Related InterviewSolutions