Question

how to integrate by substitution for (x^2+1)/(x+1) ?

Answer 1

thank you for ur time, but im not taught using sin cos..

Answer 2

\[
\frac{x^2+1}{x+1} = \frac{x^2-1+2}{x+1} = \frac{(x-1)(x+1)+2}{x+1}=x-1+\frac{2}{x+1}
\]

Answer 3

You can let \(u = x+1\)

Answer 4

wio how do u get x2+1= x2-1+2?

Answer 5

\(1 = 2-1 = -1 + 2\)

Answer 6

hmm ok thx!

Answer 7

why are both the answers so diff? im confused :(

Answer 8

x²-x+2ln(x+1)