The nth term of a sequence is given 31 – n , find the sum of the first terms of the sequence.
-
A.
(frac{13}{9}) -
B.
1 -
C.
(frac{1}{3}) -
D.
(frac{1}{9})
Correct Answer: Option A
Explanation
Tn = 31 – n
S3 = 31 – 1 + 31 – 2 + 31 – 3
= 1 + (frac{1}{3}) + (frac{1}{9})
= (frac{13}{9})