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.
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5
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, .....
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