MathDB

25

Part of 1956 AMC 12/AHSME

Problems(1)

Sum of Odd Numbers

Source:

2/15/2009
The sum of all numbers of the form 2k \plus{} 1, where k k takes on integral values from 1 1 to n n is: (A)\ n^2 \qquad(B)\ n(n \plus{} 1) \qquad(C)\ n(n \plus{} 2) \qquad(D)\ (n \plus{} 1)^2 \qquad(E)\ (n \plus{} 1)(n \plus{} 2)
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