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chap7sec4 - 7.4 Integration of Rational Functions by...

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7.4 Integration of Rational Functions by Partial Fractions Partial fraction decomposition is the reversal of combining fractions. A fraction broken down into its component parts is much easier to integrate. In fact, it may not even be possible to integrate  without the decomposition taking place. There are four cases considered in this section, we will only look at the first two. To apply the techniques of partial fraction decomposition, the degree of the numerator must be less than the degree of the  denominator. If this is not the case, you must perform long division before the decomposition process can proceed. Consider :   ( ) ( ) ( ), ( ) are polynomials. ( ) P x f x P x Q x Q x = CASE I - Q(x) is a product of distinct linear factors. In this case, you will set up a fraction for each factor of the denominator.
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