Given f(x)=5x+7 and g(x)=x^2+7, find (g 0 f)(x). I think it is (g 0 f)(x) = (5x)^2+14, gut not sue thanks for any help given.

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- Jun 24th 2006, 11:51 PMkwtolleyalgebra and trigonometry with analytic geometry problem
Given f(x)=5x+7 and g(x)=x^2+7, find (g 0 f)(x). I think it is (g 0 f)(x) = (5x)^2+14, gut not sue thanks for any help given.

- Jun 25th 2006, 12:19 AMCaptainBlackQuote:

Originally Posted by**kwtolley**

RonL - Jun 25th 2006, 12:40 AMkwtolleyanswer
so 5x^2+7 is the answer. thanks again.

- Jun 25th 2006, 12:45 AMCaptainBlackQuote:

Originally Posted by**kwtolley**

$\displaystyle

(g \circ f)(x)=g(f(x))=g(5x+7)=(5x+7)^2+7$$\displaystyle =25x^2+70x+56

$

RonL - Jun 25th 2006, 05:51 AMtopsquarkQuote:

Originally Posted by**kwtolley**

-Dan