first of all you have a typo
you probably mean f(y)=y-1/y
in any case to solve y=x-1/x, you multiply by x giving you a quadractic
so use the quadratic equation and solve for x.
Its been quite a few years since my calculus days so I'm probably missing something obvious. Somebody can probably do this in a couple seconds...
solve for y.
I'm just trying to solve one of them at zero
Souldn't I be trying to solve this?
And then this?
I know I'm missing something here...something tells me I'll be doing and infinite loop of quadratic equations.