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2014-02-12 05:07:25 -0500 commented answer Limit of 1/x = infinty?

Thanks. I get it now, although returning infinity when asking for the two-sided limit seems a bit misleading to me. But it's not just sage doing it...

2014-02-12 05:06:08 -0500 marked best answer Limit of 1/x = infinty?

Infinity is not signed There also +Infinity and -Infinity .

example :

sage: limit(1/x, x=0)
Infinity
sage: limit(1/x, x=0, dir='+')
+Infinity
sage: limit(1/x, x=0, dir='-')
-Infinity

Look at here : http://www.sagemath.org/doc/reference/calculus/sage/calculus/calculus.html

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2014-02-12 04:04:50 -0500 asked a question Limit of 1/x = infinty?

Hi,

I don't get why limit(1/x, x = 0) returns infinity.

Shouldn't it be undefined?

Interestingly, Mathematica also returns infinity, but on Wolfram Alpha it says two-sided limit does not exist.

2013-11-03 13:34:50 -0500 asked a question Is there a command to retrieve the last answer?

Is there a way to retrieve the last computed answer? Like Mathematica's % command?

Thanks.