Find intervals of increasing/decreasing
Find intervals of increasing/decreasing
Last updated at April 16, 2024 by Teachoo
Example 10 Find the intervals in which the function f given by f (x) = x2 â 4x + 6 is (a) strictly increasing (b) strictly decreasingf (đĽ) = đĽ2 â 4đĽ + 6 Calculate fâ(đ) đâ (đĽ) = 2đĽ â 4 Calculate fâ(đ) = 0 2đĽ â 4 = 0 2đĽ = 4 đĽ = 4/2=2 Hence đĽ = 2 divide real line into 2 disjoint intervals. Plotting points on number line