Solution:
Since x is an odd integer, x^2 is also odd, and therefore, x^2 + x + 3 = odd + odd + odd = odd.
Answer: D
If x is an odd integer, which of the following is also an odd integer?
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Since x is an odd integer, x^2 is also odd, and therefore, x^2 + x + 3 = odd + odd + odd = odd.
Answer: D
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