Question

(n+3)! . ( n-1) !
(n-2)! (n +2)! ​

Answer 1

Resposta:

(n+3)! / (n-2)! x (n-1)! / (n+2)!

agora cancela os fatoriais iguais.

(n+3)(n-1)= n²+2n-3

Se quiser complementar,

Δ=-2+-√2²-4.1.(-3) / 2

Δ=-2+-4 / 2

n'= -2+4/2 = 1

n''=-2-4/2 = -3