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anonymous
 4 years ago
\[ \int \frac{x}{x^2+1}dx \]
anonymous
 4 years ago
\[ \int \frac{x}{x^2+1}dx \]

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phi
 4 years ago
Best ResponseYou've already chosen the best response.0this (almost) looks like u^1 du

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0This smells of parts, but I'm having trouble with \[\int\limits \frac{1}{x^2+1}dx\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Although that might not help

sirm3d
 4 years ago
Best ResponseYou've already chosen the best response.0can you enlighten us with the problem?

klimenkov
 4 years ago
Best ResponseYou've already chosen the best response.1Do a substitution \(u=x^2, du=2xdx\)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@sirm3d It's halfway through the DE of my last question

klimenkov
 4 years ago
Best ResponseYou've already chosen the best response.1Yes. Now make the inverse substitution.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0http://openstudy.com/users/henpen#/updates/50968019e4b0d0275a3ce47b

sirm3d
 4 years ago
Best ResponseYou've already chosen the best response.0hmm, can we try reduction of order with \[y=v(ix)\]
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