Question

Arithmetic sequence of 9, 209 409, 609 and what id the difference?

Answer 1

d=200

Explanation:

First term

a=9

Second term

a+d=209

Third term

a+2d=409

Fourth term

a+3d=609

Find the common difference (d)

From the second term

a+d=209

a=9

Therefore,

9+d=209

d=209-9

=200

d=200