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Find S. (1) S^4=S! (2) !=1

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stolyar
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Find S. (1) S^4=S! (2) !=1 [#permalink] New post   18 Dec 2004, 18:18
Find S.

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

:stupid2



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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   18 Dec 2004, 19:06
A.

in the first one, S must equal 1.

In the second one, S could be 0 or 1.
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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   18 Dec 2004, 22:43
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
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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   18 Dec 2004, 23:18
I agree with Ian, A.

I did not think about -1 too :roll:
But do you have factorial for negative numbers. I thought it was only for positive numbers :?
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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   19 Dec 2004, 00:20
gayathri wrote:
I agree with Ian, A.

I did not think about -1 too :roll:
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.
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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   19 Dec 2004, 00:26
welcome back, stolyar :)
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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   19 Dec 2004, 01:44
Exams are over. The last one was marketing. :wave :done
I need to drop by more often--still want to write about Michigan.
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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   Updated on: 19 Dec 2004, 08:40
excellent problem.

Originally posted by MA on 19 Dec 2004, 08:34.
Last edited by MA on 19 Dec 2004, 08:40, edited 1 time in total.
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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   19 Dec 2004, 08:40
From 1, S cannot be 0 as 0! is always 1 but 0^4 is 0.
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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   19 Dec 2004, 08:43
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.
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Re: Find S. (1) S^4=S! (2) !=1 [#permalink] New post   19 Dec 2004, 09:42
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.



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