【判断题】【消耗次数：1】
收敛的数列必有界
①
正确
②
错误
参考答案：
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相关题目
【单选题】
关于几种收敛的关系，正确的是
①
依测度收敛一定是a.e.收敛的
②
a.e.收敛一定依测度收敛
③
依测度收敛一定是一致收敛的
④
依测度收敛的函数列一定存在a.e.收敛的子列
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有界变差函数，说法不正确的是
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有界变差函数必定有界
②
闭区间上有界变差函数全体构成一个线性空间
③
有界变差函数可以写成两个单调增加函数的差
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可导的函数一定是有界变差的
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