Question

Find the derivative of f(x) = -10/x at x = -12

Answer 1

so you would input -12 in for x, and what would the equation then be?

Answer 2

You derivate f(x) first, then you input -12 for x.

Answer 3

f(12)= -12/-10?

Answer 4

@math&ing001
how would you derivate f(x) then

Answer 5

You find the derivative of -10/x.

Answer 6

isnt the derivative x/-10

Answer 7

Not quite, have you seen in class the derivative of 1/x ?

Answer 8

nope

Answer 9

The derivative of 1/x is -1/x^2, so f'(x)=10/x^2
Now we need to plug in -12, ie. finding f'(-12).

Answer 10

Thankyou :)

Answer 11

Welcome :)