1. find the derivative of at x=-2 2. find the derivative of f(x)=-9/x at x=6

1)

Step-by-step explanation:

f(x) = 6x⁻¹

f'(x) = -6x⁻²

     =

f'(-2) =

        =

        =

*****************************************************

2)

Step-by-step explanation:

f(x) = -9x⁻¹

f'(x) = 9x⁻²

     =

f'(6) =

        =

        =

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.