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Q. If the 7 th term of a h.p is 8 and 8 th term is 7, then its 15 th term is ?

Q. If the 7th term of a h.p is 8 and 8th term is 7, then its 15th term is ?
 

Grade:11

1 Answers

SHAIK AASIF AHAMED
askIITians Faculty 74 Points
6 years ago
Hello student,
Given 7thterm of a HP is (1/a+6d)=8
8thtermis (1/a+7d)=7
from above equations we get d=(1/7)-(1/8)=1/56
and a=(1/8)-(6/56)=1/56
15thterm of HP=1/(a+14d)=56/15
Thanks and Regards
Shaik Aasif
askIITians faculty

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