Question

simplifique a expressão (n-2)! / (n-5)!​

Answer 1

Oie, Td Bom?!

= (n - 2)!/(n - 5)!

= [(n - 2) . (n - 3) . (n - 4) . (n - 5)!]/(n - 5)!

= (n - 2) . (n - 3) . (n - 4)

= (n² - 3n - 2n + 6) . (n - 4)

= (n² - 5n + 6) . (n - 4)

= n³ - 4n² - 5n² + 20n + 6n - 24

= n³ - 9n² + 26n - 24

Att. Makaveli1996