Question

If the second term of an arithmetic progression is -4 and the fourth term is 8, find the seventh term. a) 14 b) 16 c) 18 d) 20

Answer 1

The third term is (-4 + 8)/2 = 4/2 = 2, so the common difference is 6.

The first term is -4 - 6 = -10.

The fifth term is 8 + 6 = 14.

The sixth term is 14 + 6 = 20.

The seventh term is 20 + 6 = 26.