Question

I just need my answer confirmed:

Find the derivative of f(x) = -4x2 + 11x at x = 10.

=-69

Answer 1

Show your steps.

Answer 2

You are correct.

The derivative is -8x + 11

-8(10) +11 = -69

=D

Answer 3

I plugged it into my calculator.

Answer 4

@Loveiskey18 Won't learn that way.

Answer 5

@piglet9 it's 11x, not 11.

Answer 6

-8(10) = -80
11(10) = 110
-80+110 = 30

Answer 7

@primeralph ?

Answer 8

@Loveiskey18 the derivative is 11 not 11x.....

Answer 9

Oh okay, makes sense.