If f(b)=b^2, what is the value of (f(a+b)−f(a))/b ?  Select
A) a	B) b	C) 2a + b	D) 2a +-b	E) 2b - a
start with f(a+b) before start calculations: f(a+b)=(a+b)^2= a^2+2ab+b^2   a^2+2ab+b^2 - a^2/b = (simplify a^2)   2ab+b^2/b = (cancel b's)   = 2a+b   Ans : 2a + b
<result>C</result>
If f(b)=b^2, what is the value of (f(a+b)−f(a))/b ?