Question

Known function f (x) = (2x-1) (x + 7). the value of the first derivative of the function for x = 2 is ....

help please ..

Answer 1

The answer:

21

Explanation with steps:

f (x) = (2x - 1) (x + 7)

= 2x² + 13x - 7

f '(x) = 4x + 13

f '(2) = 4 (2) + 13 = 21

Answer 2

⭐Solution⭐

✏fiven functions

f(x)= (2x-1)(x+7)

[ Differentiate w.r.to x ]

f'(x)= 2(x+7)+1(2x-1).......(2)

So, keep x = 2 in (2)

we get,

f'(2)= 2(2+7)+(2×2-1)

= 18 + 3

= 21

✏Hopes its help's u.