The Function f(x) is an Increasing Function in The Interval :
Consider the function
f (x) = -2x3 – 9x2 – 12x + 1
- The function f(x) is an increasing function in the interval
(a) (-2, -1) (b) (-¥, -2) (c) (-1, 2) (d) (-1, ¥) - The function f(x`) is a decreasing function in the interval
(a) (-2, -1) (b) (-¥, -2) only (c) (-1, ¥) (d) (-¥, -2) È (-1, ¥)