alleryWhich form describes every odd number, where k is an integer?
A2k + 2
B2k
C4k
D2k + 1
Answer & Solution
Correct answer: D. 2k + 1
1. Even numbers are of the form 2k.
2. Odd numbers are one more than an even number: 2k + 1.
3. 2k + 2 and 4k are both even.
_Source: Wikipedia, Parity (mathematics), section Definition_
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