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Math Help - integrals

  1. #1
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    integrals

    hey i am confused on how my teacher did this problem:

    S[10-((5x+3)/(x^2))]

    i think it is an indefinite integral

    the answer she got was:

    10x-5lnx+(3/x)+C

    thanks
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  2. #2
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    Quote Originally Posted by talhaguy View Post
    hey i am confused on how my teacher did this problem:

    S[10-((5x+3)/(x^2))]

    i think it is an indefinite integral

    the answer she got was:

    10x-5lnx+(3/x)+C

    thanks
    Just write the fraction,

    (5x+3)/(x^2) = 5x/x^2 + 3/x^2 = 5/x + 3/x^2 = 5x^{-1}+3x^{-2}
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  3. #3
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    hey thanks a lot. i cant believe i can't see these things....
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