单选题
If n=6×15, which of the following are prime factors of n?
A、
2
B、
3
C、
7
D、
9
E、
15
【正确答案】
A、B
【答案解析】
Because n=6×15, its prime factorization is 2×3×3×5, so its only prime factors are 2, 3, and 5.
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