Respuesta :

devishri1977

Answer:

Step-by-step explanation:

8 , 12 , 16 , 20  .......

First term = a = 8

Common difference = second term - first term = 12 - 8= 4

nth term = a + (n-1) * d

               = 8 + (n -1) * 4

                = 8 + 4n - 4

                 = 4n + 8 - 4

                 = 4n + 4