Question

The sum of 5th and 9th terms of an A.P. is 30.x

If its 25th term is three times its 8th term, find

the A.P.​

Answer 1

3,5,7, 9, ....

Step-by-step explanation:

a+ 4d + a+ 8d = 30

a + 6d = 15 ----(1)

a + 24d = 3 (a + 7d) => 2a = 3b

a/ d = 3/2 , a = 3, d = 2 ssatisfies eq. (1)

A.P : a ,a+d , a + 2d , a + 3d......

= 3 , 5 , 7 , 9, .....