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Mathematics-Online course: Preparatory Course Mathematics - Analysis - Integral Calculus

Partial Integration

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From the power rule $ (fg)'=f'g+fg'$ one obtain an analogous formula for indefinite integrals:

$\displaystyle \int f'(x)g(x)dx=f(x)g(x)- \int f(x)g'(x)dx \;. $

According to definite integrals holds:

$\displaystyle \int_a^b f'g = \left. fg \right\vert _a^b - \int_a^b fg' \;. $

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  automatically generated 1/9/2017