Question

simplifique as expressões:
a) n! / (n-1)!
b) (n+2)! / (n-1)!
c) (n+1)! + n! / 2n!
d) (n+2)! / n!
e) n! / (n-2)!
f) (n+5)! / (n+3)!
g) (2n)! / (2n-1)!
h) (n+2)! / 2!(n+1)!​
.

Answer 1

Explicação passo-a-passo:

a) n.(n-1)!/(n-1)!= n

b) (n+2).(n+1).n

c) n/2+1

d) (n+2).(n+1)= n²+n +2n+2=n²+3n+2

e)n²-n

f) (n+5).(n+4)= n² +4n +5n +20= n²+9n+20

g) 2n

h) n+2/2