How would you write this?

**Paze** · February 17th 2013, 03:04 PM

Given: 'X can be all numbers, except 2'.

I would write: 'x can be all numbers except x=2.'

But my teacher writes: 'x can be all numbers except x $\neq$ 2'

Thoughts?

**Prove It** · February 17th 2013, 03:28 PM

Your teacher's sentence doesn't make sense grammatically. I agree with yours. Other ways to write it include $\displaystyle \begin{align*} x \in \mathbf{R} \backslash \{ 2 \} \end{align*}$ or $\displaystyle \begin{align*} x \in (-\infty, 2) \cup (2, \infty) \end{align*}$ .

**Paze** · February 17th 2013, 04:07 PM

Thank you!

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