Respuesta :

devishri1977

Answer:

Step-by-step explanation:

An = 54 + 3(n-1)

n = 1 ;      A1 = 54 + 3*(1-1) = 54 + 3*0 = 54 +0 = 54

n =2 ;     A2 = 54 + 3*(2-1) = 54 + 3*1 = 54 + 3 = 57

n =3 ;     A3 = 54 + 3*(3-1) = 54 + 3*2 = 54 + 6 = 60

n =4 ;     A4 = 54 + 3*(4-1) = 54 + 3*3 = 54 + 9 = 63