I need help finding the derivative of

100P^-2

I know that 100P^2 would be 200P, but the -2 is throwing me off. Could someone help me out here? Thanks.

4 answers

exactly the same
multiply the the coeffecient by exponent and subtract one from the exponent.

-200 P ^-3
Oh, okay. I got it. Thanks!
Ok, now I have to use the derivative and solve for P. So, the equation is:

4 = -200P^-3

I can get it down to:

-50 = P^-3

But, I don't know how to get the -3 away from the P.
Check your work above. There is an error in the value on the left side. Fix that before the next step.