Question

Calcule os fatoriais:

A) 10! /( 10-2)!

B) 10! / (8-4)!

Answer 1

a) 10! (10 - 2)!

= 10! / 8!

= 10 * 9 * 8! / 8!

= 10 * 9

= 90

b) 10! / (8 - 4)!

= 10! / 4!

= 10 * 9 * 8 * 7 *6 * 5 * 4! / 4!

= 10 * 9 * 8 * 7 * 6 * 5

= 151 200

Answer 2

Bom dia!

Essas expressões se desenvolveram da seguinte  formula;

A(n,p)=n!/(n-p)!

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A) 10!/( 10-2)! → 10!/8! → 10×9×8!/8! → 10×9 = 90

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B) 10!/(8-4)! → 10!/4! → 10×9×8×7×6×5×4!/4! → 10×9×8×7×6×5 = 151200

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Att;Guilherme Lima