Question

1
15. Find the intervals in which the function f(x) = 20 - 9x + 6x - x is
i) strictly increasing and
ii) strictly decreasing.​

Answer 1

Answer:

Step-by-step explanation:

first differentiate the function with respect to x

f(x)=20-4x

on differentiating we get -4

for which we cant find the intervals of strictly increasing or decreasing function