Question

tricks for u-substitution for integrals

Answer 1

for example, i want to take the integral of\[\frac{ 2x }{ x+1 }\]

i know that i should substitute, x+1 for u

but how do i take care of the x in the numerator?

Answer 2

u = x+1
--> x =u-1

Answer 3

ahh, it's simple things like this that i totally forget haha

thank you!

Answer 4

ok