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in Binomial theorem by (46.7k points)
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Let Sk = lim n →∞∑1/(k + 1)i for i ∈ [i = 0,n]. Then  ∑kSk for n ∈ [k = 1,n] is equal to

(a)  n(n + 1)/2

(b)  n(n - 1)/2

(c)  n(n + 2)/2

(d)   n(n + 3)/2

1 Answer

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Best answer

Correct option  (d)   n(n + 3)/2

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