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
 
Regards,
Topper Learning Team
 
 
 
 

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

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