Find the derivative of f(x) = negative 8 divided by x at x = 11.

I think it’s

f ` (x) = - 8 / x²

f ` (11) = - 8 / 121

8/121 is the answer

step-by-step explanation:

i hate black

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: