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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` |
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