Answered

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Find the following.
f(x) = x + 8, g(x) = x − 8

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

(b) (f − g)(x) =

(c) (fg)(x) =

(d) (f/g)(x) =

What is the domain of f/g?
(Enter your answer using interval notation.)

Sagot :

Answer:

(f + g)(x) = 2x

(f - g)(x) = 16

(fg)(x) = [tex]x^{2}[/tex] - 64

(f/g)(x) = (x + 8)/(x - 8)      Domain:    x < 8 ∪ x > 8

Step-by-step explanation:

(f + g)(x) = f(x) + g(x) = x + 8 + x - 8 = 2x

(f - g)(x) = f(x) - g(x) = x + 8 - (x - 8) = x + 8 - x + 8 = 16

(fg)(x) =  f(x)g(x) = (x + 8)(x - 8) = [tex]x^{2}[/tex] - 64

(f/g)(x) = f(x)/g(x) = (x + 8)/(x - 8)

              x - 8 ≠ 0

              x ≠ 8

Domain:    x < 8 ∪ x > 8

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