Asked by Nicole
I need some help with some algebra problems please.
I don't under stand how to do that following.
Find and simplify the difference quotient f(x+h) -f(x)/h, h cannot equal 0 for the given function.
1. f(x)=5x^2
2. f(x)x^2+3x+9
I don't under stand how to do that following.
Find and simplify the difference quotient f(x+h) -f(x)/h, h cannot equal 0 for the given function.
1. f(x)=5x^2
2. f(x)x^2+3x+9
Answers
Answered by
bobpursley
The first:
f(x+h)=5(x+h)^2=5x^2+10xh+5h^2
f(x+h)-f(x)= 5x^2+10hx + 5h^2-5x^2=
10hx +5h^2
divided by h
10x + 5h
as the limit of h>>0
10x
f(x+h)=5(x+h)^2=5x^2+10xh+5h^2
f(x+h)-f(x)= 5x^2+10hx + 5h^2-5x^2=
10hx +5h^2
divided by h
10x + 5h
as the limit of h>>0
10x
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