Question

int_{inf}^{?inf} 1/(1+x ^{4}) dx

Answer 1

What? lol can you rewrite it in the comments?

Answer 2

I"m assuming its an integral, remember:

\[\int\limits_{-\infty}^{\infty} f(x) dx = \int\limits_{-\infty}^{0} f(x) dx + \int\limits_{0}^{\infty} f(x) dx\]

= \[\lim_{t \rightarrow -\infty}\int\limits\limits_{-t}^{0} f(x) dx + \lim_{t \rightarrow \infty}\int\limits\limits_{0}^{t} f(x) dx\]

Answer 3

you have to use partial fractions, but the algebra gets messy
http://www.wolframalpha.com/input/?i=integrate+1%2F%281%2Bx^4%29+dx

Answer 4

\[\int\limits_{\inf}^{\inf}1/(1+x ^{4}) dx\]

Answer 5

@dumbcow gud answer.

Answer 6

@.Sam. I commented the question. You can try.