Question

Is it trial and error for substituition in integration

Answer 1

yep, its not straightforward like differentiation. you need to guess and you will get good at it only by practice

Answer 2

So , when there are so many terms involved it would be complex

Answer 3

Maybe.. but have faith in your professor... he will be giving simple integrals for which you can guess the substitution easily if you think a bit...

Answer 4

Yeah ,there is no point in asking big integrals

Answer 5

Exactly ! if you can work below integral using substitution, then you can work ANY substitution integral :
\[\large \int 2x e^{x^2} dx\]

Answer 6

how to do that ^

Answer 7

@ganeshie8