Doubt from integrals

integration
hard
function
find-integral
unsolved
pp
#1

All3 ques

#2

@Meena_2020 ans c for 1

#3

1.C
2.B
3.A
plz confirm!

#4



@Meena_2020 you have any query in solution then ask me.
Thanks

#5

#6

#7

Yes the answer is right.
Thank u everyone.