Question

Find the formula for the 4th of the following A.P.S a)3,7,11........ b)12,7,2.......

Answer 1

A = 15

B = -3

Explanation:

3 ,7,11..... You add 4 each time so 11+4 is 15

12,7,2.... You take 5 each time so 2-5 is -3