Question

What is the common difference (d) of the A.P. 7, 1, – 5, – 11, ... ?​

Answer 1

d = -6

Explanation:

t1 = 7, t2 = 1, t3 = -5, t4 = -11

t2 - t1 = 1 - 7 = -6

t3 - t2 = -5 - 1 = -6

t4 - t3 = - 11 - (- 5) = -11 + 5 = -6

Therefore, the common difference is constant( I. e -6). Therefore the common difference is -6.