Question

calcule
a) 7! - 5!
b) 5 x 3!

Answer 1

7! = 7.6.5.4.3.2.1 = 5040
5! = 5.4.3.2.1 = 120

a) 7! - 5! = 5040 - 120 = 4920

3! = 3.2.1 = 6

b) 5 x 3! = 5 x 6 = 30


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Gannicus
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