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2007-11-15 07:03:11 · 6 answers · asked by biomes 1 in Science & Mathematics Mathematics

what about 1 * -inf? is it still inf

2007-11-15 07:04:57 · update #1

6 answers

inf*1 = inf
inf*-1 = inf
inf*inf = inf
1/inf = 0

2007-11-15 07:07:18 · answer #1 · answered by Jason 3 · 0 0

1/inf is 0

2007-11-15 15:06:37 · answer #2 · answered by mathguru 3 · 0 0

It depends what you mean by infinity.

1/inf is zero though

2007-11-15 15:14:59 · answer #3 · answered by Anonymous · 0 0

inf * 1 = inf
inf -1 = inf
inf * inf = inf
inf * (-1) = MINUS inf
1 * (-inf) = MINUS inf

1/inf approaches zero if you go though a limit process.

2007-11-15 15:07:25 · answer #4 · answered by tkquestion 7 · 0 0

inf is not a number, so what you wrote is incorrect
The correct notation is
(lim x-->∞ x )*1 = ∞

(lim x-->∞ x )-1 = ∞

(lim x-->∞ x )* (lim x-->∞ x ) = ∞

1/ (lim x-->∞ x ) = 0

Just think intuitevely, when x becomes bigger, 1/x becomes smaller and it goes to 0

2007-11-15 15:10:17 · answer #5 · answered by Theta40 7 · 0 0

1*-inf is -inf

and i think the answer to the first one is yes

2007-11-15 15:06:11 · answer #6 · answered by mimi2424 2 · 0 0

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