For a positive integer

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

For a positive integer pp, the sum ∑k=3p+24\displaystyle\sum_{k=3}^{p+2} 4 equals (a) 4p+44p+4 (b) 4(p−1)4(p-1) (c) 4p4p (d) 4(p+2)4(p+2)

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