Answer:
f−1(x) = (x - 15)³
Explanation:
f(x)=15+³√x
And to inverse the function we need to switch the x for f−1(x), and then solve for f−1(x):
x =15+³√(f−1(x))
x- 15 =15+³√(f−1(x)) -15
x - 15 = ³√(f−1(x))
(x-15)³ = ( ³√(f−1(x)) )³
(x - 15)³= f−1(x)
f−1(x) = (x - 15)³