Rewrite the sum using sigma notation. 4 4 4 4 + + + + ... 1.2 2.3 3.4 4.5 Which summation represents the sum? 4 Ο Α.Σ k(k + 1) k=1 4 Ο Β. Σ k(k + 1) k = 0 4 4 Oc. Σ k(k + 1) k=1 4 O D. Σ k = 1

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