Question

determine the A.P whoae fifth term is 15 and the difference of the eight term from the thirteenth term is 20

Answer 1

Answer: 5 term = 15

a+4d=15 ----1

13 term - 8 term = 20

a+12d-a-7d=20

5d=20

d=4

Put d=4 in eq.1

a+4x4=15

a+16=15

a=-1

A.P.-- -1,3,7......

Step-by-step explanation: