Question

Simplifique as expressões
a) (n+1)! (n+3)! / (n+2)! (n+4)!

Answer 1

    Simplificar:

    (n + 1)!(n + 3)! / (n + 2)!(n + 4)!  =  (n + 1)!(n + 3)! / (n + 2)(n + 1)!(n + 4)(n + 3)!

    ...................................................... =    1 / (n + 2)(n + 4)

    ...................................................... =    1 / n² + 6n + 8