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1-89.

f(g(x)) = f(x + 3) = ______________

Refer to hint (a).

Even though f −1(x) is the inverse of f(x), you do not need to find the equation of the inverse. Simply evaluate 6 as the y-value and solve for x.

6 = f(x)
6 = x2 + 5
1 = x2
x = ± 1

Refer to hint (c).