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Question
If f(x) = 2x2 + 3, g (x) = 5x − 2, then find g ° g
Solution
f(x) = 2x2 + 3, g (x) = 5x − 2
(g ° g) (x) = g[g(x)]
= g(5x − 2)
= 5(5x − 2) − 2
= 25x − 12
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