Question

Find the derivative of f(x) = -7/x at x = -3

Answer 1

f(x)=-7/x
so write x in the form of (x)^-1 and 7 is a constant
so d/dx(fx)=-7*(d/dx)(x^-1)=-7*(-1*x^-2)=7/x^2
at x-=3
derivative=7/9

Answer 2

thanks you!

Answer 3

wlcm :)