Question

@perl

Answer 1

what is the problem if you can use a calculator ?

Answer 2

lol

Answer 3

you don't need the absolute value in this case.

Answer 4

\(\large\color{blue}{\displaystyle \int_{1}^{2}{
\rm Ln}(x^2+1)~dx}\)

Answer 5

to do this one, use integration by parts as your first step.
(if you want to do by hand)

Answer 6

you know there is a site wolframalpha.com (?) :)
go for it.... if you want to do it by hand and need help doing it by hand you can always ask... :D

Answer 7

http://www.wolframalpha.com/input/?i=evaluate+integral+1+to+2++Ln+%28x%5E2%2B1%29+dx

Answer 8

i got the question wrong last time

Answer 9

well, I don't think wolfram can be wrong.
I haven't seen such a thing before.

Answer 10

and "log" is assumed a natural log, ... so you are good.

Answer 11

thank you(: