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Let ƒ : R → R be defined as ƒ(x) = x 3 + x – 5 If g(x) is a function such that ƒ(g(x)) = x, ∀ ′ x ′ ∈ R , then g ′ (63) is equal to________.

1. 49 1
2. 49 3
3. 49 43
4. 49 91

Correct answer: 49 1

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