calculus
posted by Kim .
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)?

assume you forgot parentheses
g(x) = x /(x+2)
g = (x^21)/(x^21+2)
= (x^21)/(x^2+1)
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