Posted by Bonnie on Monday, June 22, 2009 at 6:32pm.
Please Find the difference quotient
f(x+h)fx/h for f(x)= 4x9 and simplify

Algebra  bobpursley, Monday, June 22, 2009 at 8:20pm
put x+h in f(x) to get 4x+4h9
then subtract 4x+9 then divide by h

Algebra  Bonnie, Monday, June 22, 2009 at 8:24pm
This is what I got, is it correct? Thanks!
4x+4h9+ (4x+9)/h
4x4x= 4h9+9/h
= 4h/h
=4

Algebra  MathMate, Monday, June 22, 2009 at 9:14pm
Your answer is correct, but it is preferable to place parentheses where they are needed to avoid ambiguity, for example:
(4x+4h9+ (4x+9))/h
(4x4x + 4h9+9)/h
= 4h/h
=4
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