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December 20, 2014

December 20, 2014

Posted by **Kim** on Saturday, September 27, 2008 at 1:51am.

f(x) = x^2 - 1, g(x) = x/x + 2

Why is x^2 - 1/x^2 + 1 the equation of (g o f)(x)?

- calculus -
**Damon**, Saturday, September 27, 2008 at 6:31amassume you forgot parentheses

g(x) = x /(x+2)

g = (x^2-1)/(x^2-1+2)

= (x^2-1)/(x^2+1)

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