Question

If f(x) = x
– 6x+8 then f’(5) – f’(8) is equal to
(a) f’(2)
(b) 3. f’(2)
(c) 2. f’(2)
(d) none of these.

​

Answer 1

Answer: Option C

Explanation:
f’x = 2x-6
f’(5) = 10-6=4
f’(8) = 16-6=10
f’(5) - f’(8) = 4-10 =-6
Option verification:
f’(2) = 4-6= -2
3f’(2)=-6
So, option c is correct.



Hope it helps...
Please mark my answer as the brainliest answer...