【判断题】【消耗次数：1】
设m,n?N，(m,n)=1，则j(mn) = j(m)j(n).
①
正确
②
错误
参考答案：
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相关题目
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循环结束的条件不合法
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计算两个整数n和m（m1000）之间所有数的和。n和m从键盘输入。例如，当n=1，m=100时，sum=5050，当n=100，m=1000时，sum=495550。
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