## anonymous 4 years ago antidiff proving..

1. anonymous

$f(x)=\ln (x ^{2}+1), then f'(x)=\frac{ 2x }{ x^2 +1 }$ use this fact to find an antiderivative of $\frac{ (x+1)^1 }{ x^2 +1 }$

2. Goten77

|dw:1358842187903:dw| hmm let me think a min

3. Goten77

|dw:1358842446733:dw| tbh i dont think this 1 has a anti derivative

4. anonymous

sorry it is 2!

5. Goten77

oh that changes a lot then

6. Goten77

|dw:1358842715117:dw|

7. anonymous

are there all the infomations i have to give?

8. Goten77

|dw:1358842883107:dw|

9. Goten77

hmm i would use just the last 2 boxes... the other ones were kinda wrong since you forgot to mention the to the power of 2 part....