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OpenStudy (anonymous):
Find the value of n such that (permutation) (i) nP = 42 n P, n >4 5 3
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Directrix (directrix):
Is this two questions or one? I see the P(n,5) but don't know about the second part. Thanks.
OpenStudy (anonymous):
second part is 42*P(n,3)
Directrix (directrix):
Do you know the formula for permuatations? I can look it up but if you know it, please post it on this thread.
OpenStudy (anonymous):
(n!)/(n-r)!
OpenStudy (anonymous):
I have done it. is n=9
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Directrix (directrix):
That's great.
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