Find the derivative of y=1/x at x=1/4 Answer: 1/1/16
y = 1/x
y' = -1/x^2
y'(1/4) = -1/(1/16) = -16
I think you lost a minus sign. And, of course, you have displayed the usual sloppiness with parentheses.
y' = -1/x^2
y'(1/4) = -1/(1/16) = -16
I think you lost a minus sign. And, of course, you have displayed the usual sloppiness with parentheses.