1. ## Solving this derivative

x + 1/x

dy/dx =

Solve for x

1/x^2 = -1

x^2 = -1 * -1

x = + or - sqrt 1

Is this correct? If so, I don't see how it works, as the answer only has a +1 as a stationary point coordinate. The other x is a 5, but I don't see how you'd get that.

2. Unless there's some information we're missing here, you are correct when you say that $x=1$ and $x=-1$ are the only stationary points.

3. Well I was looking at the wrong answer heh.