Increasing and Decreasing Functions

The intervals in which the function f given by f (x) = x² – 4x + 6 is increasing is

• none of these

The logarithmic function is increasing on

• increasing

• decreasing

• increasing and decreasing both

• neither increasing nor decreasing

The function f (x) = tan x – 4x is strictly decreasing on

• none of these

• none of these

The interval on which the function f (x) = 2x³ + 9x² + 12x – 1 is decreasing is:

y = x (x – 3)² decreases for the values of x given by :