Question

1,4,13____,121
5,12,33__
whats the pattern rule

Answer 1

Explanation:

1,4 ,13 , __________, 121

First term = 1

Second term = 1 + 3 = 4

Third term = 4 + 3*3 = 4 + 9 = 13

Fourth term = 13 + 3*3*3 = 13 + 27 = 40

2) 5, 12 , 33 ,_____

First term = 5

Second term = 5 + 7 = 12

Third term = 12 + 7*3 = 12 + 21 = 33

Fourth term = 33 + 7*3*3 = 33 + 63 = 99