Q: The value of Σ_{x=1}^n 1 / ((x + 3)(x + 4)) is
(a)n / (n + 2)
(b)2 n / (n + 1)
(c)n / 4(n + 4)
(d)n / 2(n + 2)
Correct Answer: (c)
The correct answer is (a) 'n / (n + 2)'. This question from the General Studies domain tests knowledge of Miscellaneous.