SOLUTION: can u help me.. composite function.. f(x)=x^2 - 1 g(x)= 1/sqrt x + 1 fog(x)

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Question 630997: can u help me..
composite function..
f(x)=x^2 - 1
g(x)= 1/sqrt x + 1
fog(x)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
composite function..
f(x)=x^2 - 1
g(x)= 1/sqrt x + 1
fog(x) = f[g(x)]
= f[1/sqrt(x+1]
= [1/sqrt(x+1)]^2 -1
= x+1-1
= x
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Cheers,
Stan H.