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21-10-2017
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if f(x) = 6/x+8 and g(x) = 7/8x what is (f of g)(x)

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21-10-2017

Assuming that the x+8 are both under the denominator and not (6/x)+8:

Replace x in the f(x) with g(x).
f(x)=6/(7/8x + 8)

Simpify.
f(x)=[tex]\frac{6}{ \frac{7x+64}{8} } [/tex]
f(x)=[tex] \frac{48}{7x+64} [/tex]

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