Given g is a one-to-one function
g(1) = 5
g-1(5) = 1
Given h is a one-to-one function
h(x) = 4x + 9
y = 4x + 9
(y-9)/4 = x
h-1(x) = (x-9)/4
(h-1°h)(-2) = h-1(h(-2))
= h-1(1) [ as h(-2) = 1]
= (1-9)/4
= -2
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