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help? f(x)=2x+5 and g(x)=1-x² then f(g(2))= ? how do i solve this

matt394

by matt394 at February 22, 2010

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f(x) = 2x + 5g(x) = 1 - x^2(rewritten for reference)Okay, so we need to find what f( g(2) ) is equal to. This problem basically says "if g(2) equals x, put x into f(x) and find the answer of f(x). So first, we need to find what g(2) equals.g(2) = 1 - (2)^2       = 1 - 4       = 3So, g(2) = 3.Now we plug 3 into function f and find what f(3) equals.f(3) = 2(3) + 5       = 6 + 5       = 11So, f (g(2) ) = 11.~ Azaler

Azaler Azaler February 22, 2010

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what he said.

JkSkCoo JkSkCoo August 09, 2010

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g(2)=-3 ,(f(g(2))=-1 some one check

matt394 matt394 August 10, 2010

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