# Math Help - integration using partial fractions

1. ## integration using partial fractions

integrate 1/(x^(1/2) - x^(1/3)). I only that i should substitute u for x^(1/6)

2. Originally Posted by twilightstr
integrate 1/(x^(1/2) - x^(1/3)). I only that i should substitute u for x^(1/6)
$\int \frac{1}{x^{1/2} - x^{1/3}} \, dx = \int \frac{1}{u^3 - u^2} \, (6 u^5 \, du) = 6 \int \frac{u^3}{u - 1} \, du = 6 \int u^2 + u + 1 + \frac{1}{u-1} \, du$