# Division by zero? [closed]

Does 2/0 equal 2/0 ?

Please consider it seriously

Thank you.

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You're not clear enough. –  Marra Aug 8 '13 at 12:31
$\lim_{x\to 1^+}\frac{2x}{x-1}\neq \lim_{x\to 1^-}\frac{2x}{x-1}$ –  B. S. Aug 8 '13 at 12:33
No man has $2$ heads. One man has $1$ more head than no man ($0$ man), hence $3$ heads. –  Dietrich Burde Aug 8 '13 at 12:33
@user89544 Everyone will take it seriously if you provide enough background. –  pranitkothari Aug 8 '13 at 12:50

## closed as unclear what you're asking by Tobias Kildetoft, Zev Chonoles, YACP, Cameron Buie, DonAntonioAug 8 '13 at 12:51

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.

$\dfrac 20 = \dfrac 20$, only in the sense that if $P$ is undefined, then $P$ is equal to $P$, which like $P$, is undefined.

To be clear, $\dfrac 20$ is undefined, since division by zero is undefined.

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Nice Amy, if I were you I would make some words bold above. :) –  B. S. Aug 8 '13 at 12:37
By that reasoning does $\infty = \infty$ ? –  skullpatrol Aug 8 '13 at 12:39
@skullpatrol: Arguably, that follows from the reflexivity of equality. Why shouldn't it be true that $$\quad\heartsuit\!\!\!\boxtimes\!\!\!\!\!\Large\rbrace\!\!\!@ \normalsize=\heartsuit\!\!\!\boxtimes\!\!\!\!\!\Large\rbrace\!\!\!@ \normalsize\quad ?$$ –  Zev Chonoles Aug 8 '13 at 12:46
$\infty$ is not any number and so is $-\infty$. not any number = not any number, therefore $\infty = -\infty$ ? –  skullpatrol Aug 8 '13 at 13:12
Skullpatrol, now you're just being silly –  Adam Rubinson Aug 8 '13 at 14:04