Posted by **Soly** on Saturday, September 1, 2007 at 3:31pm.

I don't understand how to do the folliwing problems.

Find and simplify the difference quotient f(x+h) -f(x)/h, h cannot equal 0 for the given formula.

1. f(x)=5x^2

options: a. 5, b.5(2x+h), c. 10/h +x+5h, d. 5(2x^2+2xh+h^2)/h

2. f(x)=x^2+3x+9

options: a. 2x+h+9, b.1, c.2x^2+2x+2xh+h^2+h+18/h, d. 2x+h+3

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