Find S. (1) S^4=S! (2) !=1 : Quant Question Archive [LOCKED]
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# Find S. (1) S^4=S! (2) !=1

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SVP
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Find S. (1) S^4=S! (2) !=1 [#permalink]

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18 Dec 2004, 17:18
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Find S.

(1) S^4=S!
(2) [S^4]!=1

CIO
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18 Dec 2004, 18:06
A.

in the first one, S must equal 1.

In the second one, S could be 0 or 1.
SVP
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18 Dec 2004, 21:43
ian7777 wrote:
A.

in the first one, S must equal 1.

In the second one, S could be 0 or 1.

In the second one S can be -1
Director
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18 Dec 2004, 22:18
I agree with Ian, A.

I did not think about -1 too
But do you have factorial for negative numbers. I thought it was only for positive numbers
SVP
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18 Dec 2004, 23:20
gayathri wrote:
I agree with Ian, A.

I did not think about -1 too
But do you have factorial for negative numbers. I thought it was only for positive numbers

I don't have factorials for negative numbers. It works for 0 too.
CEO
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18 Dec 2004, 23:26
welcome back, stolyar
SVP
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19 Dec 2004, 00:44
Exams are over. The last one was marketing.
I need to drop by more often--still want to write about Michigan.
VP
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19 Dec 2004, 07:34
excellent problem.

Last edited by MA on 19 Dec 2004, 07:40, edited 1 time in total.
Director
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19 Dec 2004, 07:40
From 1, S cannot be 0 as 0! is always 1 but 0^4 is 0.
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19 Dec 2004, 07:43
gayathri wrote:
From 1, S cannot be 0 as 0! is always 1 but 0^4 is 0.

yes, i agree with you. therefore, i edited my reply. i thought 0 to the power is 1. thanks gayathri.
CIO
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19 Dec 2004, 08:42
stolyar wrote:
ian7777 wrote:
A.

in the first one, S must equal 1.

In the second one, S could be 0 or 1.

In the second one S can be -1

you're right...didn't think about that one. that only makes it less reliable. Still A.
19 Dec 2004, 08:42
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