"If "int (log (logx))/(7x)dx=klogx[1-log...

`"If "int (log (logx))/(7x)dx=klogx[1-log(x)]+c`, then k=.....

A

`(1)/(7)`

B

1

C

`-1`

D

`-(1)/(7)`

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Verified by Experts

The correct Answer is:

D

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