Question

write using rule method : [A= 2,9,28,65,126]​

Answer 1

Step-by-step explanation:

The series 2,9,28,65,_,217 is (N^3+1) where N starts from 1.

(1^3)+1 = 1+1 =2

(2^3)+1 = 8+1 =9

(3^3)+1 = 27+1 =28

(4^3)+1 = 64+1 =65

(5^3)+1 = 125+1 =126

(6^3)+1 = 216+1 =217

The missing number is 126.