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functions: f(x)=3x+2, g(x)=x^2, find: g(f^-1(26))

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
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lzayit95
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functions: f(x)=3x+2, g(x)=x^2, find: g(f^-1(26))

Postby lzayit95 » Tue Feb 14, 2012 1:28 pm

f(x)=3x+2
g(x)=x^2

find: g(f^-1(26))
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little_dragon
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Re: functions: f(x)=3x+2, g(x)=x^2, find: g(f^-1(26))

Postby little_dragon » Tue Feb 14, 2012 4:04 pm

lzayit95 wrote:f(x)=3x+2
g(x)=x^2

find: g(f^-1(26))

use wat they show here: http://www.purplemath.com/modules/invrsfcn.htm
f^-1(26) is x so 26=3x+2
solve for x
then plug that into g
:wave:
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