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14 November, 21:02

If f (x) = 2x - 6 and g (x) = 3x + 9, find (f + g) (x).

A. (f + g) (x) = 5x + 15

B. (f + g) (x) = 5x + 3

C. (f + g) (x) = x + 15

D. (f + g) (x) = - x - 15

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  1. 14 November, 21:14
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    (f+g) (x) = f (x) + g (x) = (2x-6) + (3x+9) = 2x-6+3x+9→ (f+g) (x) = 5x+3

    Answer: option B. (f + g) (x) = 5x + 3
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