Posted by Kim on Saturday, September 27, 2008 at 1:51am.
given the functions:
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 6:31am
assume you forgot parentheses
g(x) = x /(x+2)
g = (x^21)/(x^21+2)
= (x^21)/(x^2+1)