7. DS:n and q are both positive integers, is q the prime number?(D)
1) q is the least factor of n, except 1.
2) q has exactly two positive factors.
2还可以理解,是说q只有1和自己2个factor,是prime定义。
1能算出嘛?
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碰上如此大牛!!
谢谢了~!1
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