October 2020 2 155 Report
Fatorial: A expressão [tex] \frac{(n + 2)! + (n+1).(n-1)!}{(n+1).(n-1)!} [/tex] é:
a) n² + 2n
b) n² + 2n + 1
c) (n + 2)! + 1
d) (n + 2) . n! + 1
e) n³ + 2n² + 2n
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