Question

Massive INTEGRAL ATTACK!

Answer 1

\[\int\limits \frac{ 3x }{ 1+x^4 }\]

Answer 2

@perl?

Answer 3

@bibby ?

Answer 4

i think you can use trig substitution but i'm really rusty on integrals, sorry

Answer 5

thanks though!

Answer 6

I tried that, I'll try again!

Answer 7

try factoring out the 3 first?

Answer 8

I think I've got it!

Answer 9

integral substitution: x^2=U

Answer 10

can someone solve it to see if he/she gets as well 1.5arcttang2?

Answer 11

x^2?

Answer 12

it's \[\sqrt{2} \]between

Answer 13

and zero

Answer 14

are those the bounds of the integral

Answer 15

yeah, then you'll get \[du=2xdx\]

Answer 16

yes

Answer 17

http://www.wolframalpha.com/input/?i=integral+0+to+sqrt+2+3x%2F%281%2Bx%5E4%29
for what it's worth. sorry I'm not capable of helping you with the computation

Answer 18

thanks allot! I needed the verification!

Answer 19

wolfram alpha is good for that

Answer 20

make the substitution x^ 2 = tan theta

it becomes very easy after that