integrate: 2x^2 / x^2 + 4 dx how do know which substitution to use here and what happens to the numerator???
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Originally Posted by razorfever integrate: 2x^2 / x^2 + 4 dx how do know which substitution to use here and what happens to the numerator??? First do some long division to turn the integrand into . Then you work with the fact that .
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