Pre calculus question, need a lil assisting on, please

Question

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625

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If f(x)=3(x+5)+(4/x), what is f(a+2)

A. 3(a+2)+(4/a)+2

B.3(a+7)+(4/a+2)

C.3(f(a)+5)+(4/f(a)+2)

Guest Sep 15, 2018

Rom · Answer 1 · 2018-09-15T07:21:00

$f(a+2) = 3((a+2)+5) + \dfrac{4}{a+2} = 3(a+7) + \dfrac{4}{a+2} \\ \\ \text{i.e. choice B}$

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