482) Find the domain of (f + g)(x) when f(x) =
and g(x) =
1 x
A) 3, ∞ B) - 3, ∞ C) (-∞, 0) ∪ (0, ∞) D) - 3, 0 ∪ (0, ∞) Answer: A
483) Find the domain of
f g
A) B)
(x) when f(x) =
and g(x) =
1 x
3
, 0 ∪ (0, ∞) 2
3
,∞ 2
C) (-∞, 0) ∪ (0, ∞) 3 D) - , ∞ 2 Answer: B 2 484) Find the domain of (f + g)(x) when f(x) = 5x - 10 and g(x) = x- 5 A) (-∞, ∞) B) (-∞, 5) ∪ (5, ∞) C) (-∞, -2) ∪ (-2, ∞) D) (-∞, -5) ∪ (-5, ∞) Answer: B 2x 5 485) Find the domain of (f - g)(x) when f(x) = and g(x) = x- 5 x+1 A) (-∞, -5) ∪ (-5, -2) ∪ (-2, ∞) B) (-∞, -1) ∪ (-1, 5) ∪ (5, ∞) C) (-∞, -5) ∪ (-5, 1) ∪ (1, ∞) D) (-∞, ∞) Answer: B 2 486) Find the domain of (fg)(x) when f(x) = and g(x) = -4x - 5 x - 12 A) (-∞, ∞) B) (-∞, -12) ∪ (-12, ∞) C) (-∞, 5) ∪ (5, ∞) D) (-∞, 12) ∪ (12, ∞) Answer: D
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