Respuesta :

ronhagrid310

Answer:

A(n) = A(n-1) x 3

=> A(4) = A(3) x 3 = 45 x 3 =135

esthergaia

Answer:

135

Step-by-step explanation:

the pattern is that each number is multiplied by 3

5 x 3 = 15

15 x 3 = 45

45 x 3 = 135

Hope this was helpful :-)