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animalsavior94

  • 4 years ago

find (f o g)(x) find the domain of the composite function: f(x)=13/x+2; g(x)= x-5

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  1. anonymous
    • 4 years ago
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    \[f(g(x))=f(x-5)=\frac{13}{(x-5)+2}=\frac{13}{x-3}\]

  2. anonymous
    • 4 years ago
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    i just replaced the x in f(x) by x - 5

  3. anonymous
    • 4 years ago
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    of course you cannot divide by 0, so the domain is all numbers except where x - 3 = 0 i.e all numbers except x = 3

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