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Answer:
D. f^-1(x) = x^3 +15
Explanation:
The inverse of ...
y = f(x)
is ...
x = f(y)
Solving this for y gives ...
x = ∛(y -15)
x³ = y -15 . . . . . . . . cube both sides
x³ +15 = y . . . . . . . add 15
The inverse function is ...
f^-1(x) = x³ +15