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To prove 1 + 3 + ... + (2k - 1) = k squared, which term moves P(k) to P(k + 1)?
A2k + 3
B2k + 1
C2k
Dk + 1
Answer & Solution
Correct answer: B. 2k + 1
The odd number after 2k - 1 is 2k + 1, and k squared plus 2k + 1 equals (k + 1) squared.
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