Question

Me ajudemmm, é urgente

Answer 1

a) [(n+1).n!]/n!=15

n+1=15

n=14

b) [(n+2).(n+1)!]/(n+1)!=10

n+2=10

n=8

c) x!=120

1.2.3.4.5=120

5!=120

x=5

d) [(2n+2).(2n+1)!]/(2n+1)!=5

2n+2=5

2n=3

n=3/2