For the function below, find a) the cntical numbers, b) the open intervals where
ID: 3096968 • Letter: F
Question
For the function below, find a) the cntical numbers, b) the open intervals where the function increasing, and c) the open intervals where it is decreasing f(x) = 2.6 + 4.2x- 1.1x2 The cntical numbers) is/are (Use a comma to separate answers as needed.) List any interval(s) on which the function is increasing (Type your answer in interval notation Use a comma to separate answers as needed.) List any interval(s) on which the function is decreasing (Type your answer in interval notation Use a comma to separate answers as needed )Explanation / Answer
The critical number for a quadratic can be computed with -b/2a= -4.2/-2.2=21/11 (1.09090909...) From neagtive infinity to our critical number the function is increasing and from our critical number to positive infinity our function is decreasing. You can tell this from the long-run behavior of a quadratic with negative term of degree two. Hope this helps!