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April 18, 2014

Homework Help: Math (Grade 12)

Posted by Lucy on Wednesday, September 17, 2008 at 5:50pm.

I need help with this problem (composite functions):
If f(x) = 4x-3 and h(x )= 4x^2-21, find a function g such that f(g(x)) = h.

I don't understand how we're supposed to combine the functions.

Oh, and the answer is supposed to be g(x) = x^2 - (9/2).

Thanks!

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