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Math Help - Partial fractions

  1. #1
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    Partial fractions

    I think you solve this by parial fractions,but not sure
    The question is, the admittance of an electronic circuitis given by

    A = 2f+1/(f+3)(f-3) where f is the frequency
    (i) Express A as the sum of a partial fraction
    (ii)Intregrate A with respect to f
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  2. #2
    MHF Contributor

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    Quote Originally Posted by Jaffa View Post
    I think you solve this by parial fractions,but not sure
    The question is, the admittance of an electronic circuitis given by

    A = 2f+1/(f+3)(f-3) where f is the frequency
    (i) Express A as the sum of a partial fraction
    (ii)Intregrate A with respect to f
    Well, the fact that it says "partial fractions" should ease any doubts you have! Partial fractions means choosing numbers A and B such that \frac{2f+1}{(f+3)(f-3)}= \frac{A}{f+3}+ \frac{B}{f-3}
    One way to find A and B is to multiply both sides by (f-3)(f+3) to get rid of the fractions, the set f to whatever two values you want to get two equations to solve for A and B.
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