05-10-2012, 09:05 PM
...no.
Because you did not define z.
Also, to state that a value can be infinite, you would not say "x = x", you would say "-∞ < x < ∞".
Because you did not define z.
Also, to state that a value can be infinite, you would not say "x = x", you would say "-∞ < x < ∞".