Question
Question: Consider an A.P. with first term 'a' and common difference 'd'. Let S<sub>k</sub> denote the sum of ...
Consider an A.P. with first term 'a' and common difference 'd'. Let Sk denote the sum of first k terms. If Skx/Sx is independent of x, then –
A
a = 2d
B
a = d
C
2a = d
D
None of these
Answer
2a = d
Explanation
Solution
= 
=
Clearly, is independent of x if 2a = d