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19 August, 07:53

If f (x) = x + 8 and g (x) = - 4x - 3, find (f + g) (x).

A. (f + g) (x) = 5x + 11

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

C. (f + g) (x) = - 5x - 11

D. (f + g) (x) = 3x - 5

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Answers (1)
  1. 19 August, 09:05
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    Here we are simply adding the two function to create a new one ...

    (f+g) (x) = f (x) + g (x)

    (f+g) (x) = (x+8) + (-4x-3)

    (f+g) (x) = - 3x+5 (so B)
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