Question

F(x) = x^3+3
g(x) = 2x +4
Find (f.g)(1)

Answer 1

`f(x).g(x) = ({x}^(3) + 3) * (2x + 4) \\ = ({x}^(3) * 2x) + ({x}^(3) * 4)+ (3 * 2x) + (3 * 4) \\ = 2 {x}^(4) + 4 {x}^(3) + 6x + 12 \\ (f.g)(1) = 2 ({1}^(4)) + 4 ({1}^(3))+ 6(1)+ 12 \\ = 2(1) + 4(1) + 6(1) + 12 \\ = 2 + 4 + 6 + 12 = 24 \\ (f.g)(1) = 24`

Explanation:

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