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Factorial question (1 Viewer)

kpad5991

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Dec 29, 2016
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Hi can you please help,


10! = 3! x 5! x 7!

Can you express the following as products or two or more factorials?

a) 10! (different to answer above)

b) 48!

c) 24!
 

yanujw

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Suppose you have n! that you want to express as the product of smaller factorials. Let the largest of these smaller factorials be k! e.g. in the above example n = 10 and k=7

n!/k! = n(n-1)(n-2)...(n-k+1)
For the example given, 10!/7! = 10 x 9 x 8 = 720
Then it is a matter of finding smaller factorial results that multiply to give this product. To make it easier, I reccomend trying values of k that are close to n at first.

1 set of solutions for this problem includes;
a) 7! x 6!
b) 2! x 4! x 47!
c) 4! x 23!
 

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