SA 3
f(x) = (x
(X- 5)(2x + 7)(7x– 3) has zeros at I = -3.5, x= 3/7
and x = 5.

What is the sign of f on the interval 3/7
Choose 1
f is always positive on the interval.
f is always negative on the interval.
f is sometimes positive and sometimes negative on the interval.