Which is a valid prediction about the continuous function f(x)?
a) f(x) ≥ 0 over the interval [5, [infinity]).
b) f(x) ≤ 0 over the interval [–1, [infinity]).
c) f(x) > 0 over the interval (–[infinity], 1).
d) f(x) < 0 over the interval (–[infinity]. –1)
