pls help!!!!

Asked by azhardeeb | 17th Feb, 2011, 09:51: PM

Expert Answer:

Dear student,
9th term of the AP is 0.
Here we have, a+8d = 0
Adding the 29th term(a + 28d) on both the sides
i.e  a + 28d + a + 8d = a+28d
i.e. 2a + 36d = a + 28d
i.e. 2(a+18d) = a+28d
i.e. twice of 19th term = 29th term
Topper Learning Team

Answered by  | 19th Feb, 2011, 10:53: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.