Calculators Ti 89 Graphing help

So I have a project due tomorrow and I really need to use a caculator and Mine won't work right.

When insert
-1x/(x<o)/(x>-1)

It saids its not an algebraic expression how do I fix that.
I try it with an ti 84 and it worked.
 

ranger

King of all llamas
Gold Member
1,651
1
Have you tried clearing your variables? Maybe try something other that x, such as y, z, t, or even xy (which is not the same as x*y).
 

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