Answer
$\frac{f(a+h)-f(a)}{h}=0$
Work Step by Step
We are given:
$f(x)=5$
We evaluate:
$f(a)=5$
$f(a+h)=5$
$\frac{f(a+h)-f(a)}{h}=\frac{5-5}{h}=\frac{0}{h}=0$
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