The nth term of an A.P., the sum of whose n terms is Sn, is
A. Sn + Sn - 1
B. Sn - Sn - 1
C. Sn + Sn + 1
D. Sn - Sn + 1
Answer: Option B
Solution (By Examveda Team)
Sn is the sum of first n termsLast term nth term = Sn - Sn - 1
A. Sn + Sn - 1
B. Sn - Sn - 1
C. Sn + Sn + 1
D. Sn - Sn + 1
Answer: Option B
The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is
A. 600
B. 765
C. 640
D. 680
E. 690
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