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Start the planThe \(n th\) term of a sequence \(a_1, a_2, a_3, \ldots, a_n\) is given by \(a_n = \dfrac1{n(n+2)}.\) What is the sum of the first \(20\) terms of the sequence?
(A) \(\dfrac{300}{440}\)
(B) \(\dfrac{325}{462}\)
(C) \(\dfrac{303}{462}\)
(D) \(\dfrac{375}{450}\)
(E) \(\dfrac{650}{462}\)
Answer: B
Source: e-GMAT
(A) \(\dfrac{300}{440}\)
(B) \(\dfrac{325}{462}\)
(C) \(\dfrac{303}{462}\)
(D) \(\dfrac{375}{450}\)
(E) \(\dfrac{650}{462}\)
Answer: B
Source: e-GMAT
