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Atheist Forums › Science › Mathematics v
A simple one

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A simple one
Darwinian Offline
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#1
A simple one
February 18, 2010 at 6:20 pm
∞ + ∞ = ?

∞ - ∞ = ?

∞ / ∞ = ?

∞ x ∞ = ?

∞ / (∞ / 2) = ?

1 / ∞ = ?
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fr0d0 Offline
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#2
RE: A simple one
February 18, 2010 at 7:49 pm
∞
0
1
∞
1
0
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Darwinian Offline
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#3
RE: A simple one
February 18, 2010 at 7:51 pm
3/6
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Tiberius Offline
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#4
RE: A simple one
February 18, 2010 at 7:56 pm
All of those are invalid since infinity isn't a number, it's a concept.

Asking what 1 / ∞ is is like asking what 1 / 0 is. It's undefined.
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theVOID Offline
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#5
RE: A simple one
February 18, 2010 at 8:02 pm
yep, you can have ∞ > ∞ > ∞ > ∞ > ∞ > ∞...
.
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Tiberius Offline
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#6
RE: A simple one
February 18, 2010 at 8:08 pm
Indeed. Using set notation:

R = Set of real numbers.
Z = Set of integers (-2, -1, 0, 1, 2, ...)

|x| = Number of values in set x.

We get:

|R| = ∞
|Z| = ∞

Yet |R| > |Z| (it's bigger by a factor of ∞ precisely)
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Zhalentine Offline
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#7
RE: A simple one
February 20, 2010 at 1:27 pm
∞ + ∞ = infinity

∞ - ∞ = indeterminate (can indeterminate forms be applied to non-limits?)

∞ / ∞ = indeterminate

∞ x ∞ = infinity

∞ / (∞ / 2) = indeterminate

1 / ∞ = 0
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Darwinian Offline
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#8
RE: A simple one
February 20, 2010 at 1:33 pm
(February 20, 2010 at 1:27 pm)Zhalentine Wrote: ∞ + ∞ = infinity

∞ - ∞ = indeterminate (can indeterminate forms be applied to non-limits?)

∞ / ∞ = indeterminate

∞ x ∞ = infinity

∞ / (∞ / 2) = indeterminate

1 / ∞ = 0

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Welsh cake Offline
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#9
RE: A simple one
February 21, 2010 at 6:12 am
You can't add or subtract from infinity because its not a real number.
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Tiberius Offline
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#10
RE: A simple one
February 21, 2010 at 9:49 am
(February 20, 2010 at 1:33 pm)Darwinian Wrote:
(February 20, 2010 at 1:27 pm)Zhalentine Wrote: ∞ + ∞ = infinity

∞ - ∞ = indeterminate (can indeterminate forms be applied to non-limits?)

∞ / ∞ = indeterminate

∞ x ∞ = infinity

∞ / (∞ / 2) = indeterminate

1 / ∞ = 0

Well done Big Grin Have a cigar.
What basis do you have for giving him a cigar when 3 of his answers are wrong?
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A simple one

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