Q.

1log(xx)(logx+1)dx=

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

log|logx+1|+c

b

log|logx1|+c

c

loglogxlogx+1+c

d

loglogx+1logx+c

answer is C.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The given integral is 1log(xx)(logx+1)dx

Use the logarithmic property logxx=xlogx, the given integral can be written as 

1log(xx)(logx+1)dx=1xlogxlogx+1dx

Suppose that logx=t1xdx=dt

Hence, the given intergal becomes 1t1+tdt

Use partial fractions to find this integral

hence, 

   1t1+tdt=1t-11+tdt =lnt-ln1+t =lnlogx-ln1+logx+C =loglogx1+logx+C

Therefore, 1log(xx)(logx+1)dx=loglogx1+logx+C

 

Watch 3-min video & get full concept clarity

tricks from toppers of Infinity Learn

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon
∫1log(xx)(logx+1)dx=