Question
Question: In an AP : S<sub>n</sub> = n<sup>2</sup> – 2n , then fifth term is –...
In an AP : Sn = n2 – 2n , then fifth term is –
A
5
B
7
C
8
D
None
Answer
7
Explanation
Solution
Tn = (2n – 1) – 2(1) = 2n – 3 T5 = 10 – 3 = 7
In an AP : Sn = n2 – 2n , then fifth term is –
5
7
8
None
7
Tn = (2n – 1) – 2(1) = 2n – 3 T5 = 10 – 3 = 7