Question 64158
f(x)= 5, find the simplest form of f(x+h)- f(x)/ h. 
f(x+h)- f(x)/ h = f(x+h)- 5/ h. Whats the next step?
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When you say f(x)=5 you are saying that f is a constant function---
y is always 5.
Not only is f(x)=5, f(x+h) is also 5
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Therefore :
[f(x+h)-f(x)] /h =[5-5]/h = 0/h = 0
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Cheers,
Stan H.