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For f(x) = 3x and g(x) = x + 5, g(f(x)) is 3x + 5. What is its inverse?
A(x + 5)/3
Bx/3 - 5
C(x - 5)/3
D3x - 5
Answer & Solution
Correct answer: C. (x - 5)/3
Solving y = 3x + 5 for x gives x = (y - 5)/3.
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