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Mathematics for IGCSE & O level - Functions (Section 3 - No. 14)

If f(x) = 2x + 1 and g(x) = 3x - 2, what is g(f(x))?
6x - 1
6x - 3
6x + 1
5x - 1

Explanation

g(f(x)) = g(2x+1) = 3(2x+1) - 2 = 6x + 3 - 2 = 6x+1

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