What are the intervals of increase of the function graphed below?
(-∞, -3) and (3, ∞)
(-∞, -1) and (3, ∞)
(-∞, 1) and (3, ∞)
(-, ∞) and (3, ∞)
Which of these functions has a range of all real numbers?
f(x) = -18x6 - 7
f(x) = 14x4 + 3
f(x) = 12x3 + 5
f(x) = 16x2 - 1