Question

Hii !!

Solve this one , NDA :- 2020 question paper .

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Answer 1

OPTION D is correct .

In this question use substitution method .

Here ,

let = 1+Lnx = t

=( o+1/x)dx= dt

now put in the ques ,

we get

I=

$\int \: \frac{dt}{ {t}^{n} } \\ \\ = > \int \: {t}^{ - n} dt \\ \\ = > \frac{ {t}^{1 - n} }{1 - n} + c$

Now put the value of t = 1+ Lnx

soln refers to the attachment

Answer 2

Answer:

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