Asked by lexi
f(x) = x^3 and g(x) = 3x-7
If the inverses of two functions are both functions, will the inverse of the composite function made by the original functions also be a function?
If the inverses of two functions are both functions, will the inverse of the composite function made by the original functions also be a function?
Answers
Answered by
Steve
yes.
(f◦g)(x) = f(g) = g^3 = (3x+7)^3
so,
(f◦g)^-1 (x) = (∛x - 7)/3
(f◦g)(x) = f(g) = g^3 = (3x+7)^3
so,
(f◦g)^-1 (x) = (∛x - 7)/3
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