Question 577571
i dont know how to do these...
Factoral Expressions
For example..
7!/3! 2!
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7! is 7 factorial = 7*6*5*4*3*2*1 = 5040
3! = 3*2
2! = 2
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A lot of calculators have a ! button.  Get one that has that.
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7!/3! 2! = 5040/(3*2)*2 = 5040/12
= 420