Question

determine the ap whose 4th term is 18 and the difference is 9th term from 15th terms 36
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Answer 1

Answer:

a4 = 18

a+3d=18...

a15-a9=36

a+14d-(a+8d) = 36

a+14d-a-8d = 36

6d = 36

d= 6

a+18 =18

a= 18-18

a=0

the terms of Ap are 0,6,12,18 ......

Answer 2

Answer:a4 = 18a+3d=18...a15-a9=36a+14d-(a+8d) = 36a+14d-a-8d = 366d = 36 d= 6a+18 =18a= 18-18a=0the terms of Ap are 0,6,12,18 ......