How do i do this?
the function i need to find the derivative of is y=5/(x-27.7)-4. I believe the way you do this is to state that : y = 5 / U - 4 when U = x-27.7 . .: y = 5U-1 -4-1
dy/du = -5U^-2
du/dx = 1
dy/dx = dy/du * du/dx
= -5U^-2
= -5(x-27.7)^-2
= -5/(x-27.7)^2
is this correct or is there more to do?