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Q.

The antiderivative of f(x)=log(logx)+(logx)2 

whose graph passes through (e,e) is

 

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a

xlog(logx)+(logx)1+e

b

xlog(logx)+(logx)1

c

none of these

d

xlog(logx)(logx)1+2e

answer is C.

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Detailed Solution

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An antiderivative of f (x) = F(x) =

log(logx)+(logx)2dx+C=xlog(logx)xxlogxdx+(logx)2dx+C

 (integrating by parts the first term) 

=xlog(logx)x(logx)1+(logx)2dx+(logx)2dx+C

 (again integrating by parts (logx)1 =xlog(logx)x(logx)1+C

Putting x=e we have e=0e+C so C=2e

Thus F(x)=xlog(logx)(logx)1+2e

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