Question

10. If 1, a, b, 13 are in AP, find a and b.​

Answer 1

Answer:

a = 5, b = 9

Step-by-step explanation:

First term = 1

Common Difference = d

Last Term, l = a4 = 1 + 3d = 13

=> d = 4

Second term, a = 1 + d = 5

Third term, b = 1 + 2d = 9

Hope this helps!!!