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