Question

Arithemetric sequence 4,16,28,40,52
​

Answer 1

-8 + 12n

Explanation:

First term = a = 4

Common difference = d = second term - first term

= 16 - 4

= 12

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

= 4 + (n - 1)*12

= 4 + n*12 - 1*12

= 4 + 12n - 12

= 4 - 12 + 12n

= -8 + 12n