Question

An3,=3(n-1)
Me ajudem por favor ​

Answer 1

Resposta:

An.3=3( n-1 )

n! =3(n-1)

(n-3)!

n( n-1 ) ( n-2 ) ( n-3 )! =3( n-1 )

(n-3)!

n( n-1 ) ( n-2 ) = 3( n-1 )

n( n-2 ) =3

n( n-2 ) =3·1

N = 3