【判断题】【消耗次数:1】
设函数f: S?R, S=[0, +∞), f(x)=1/(x+1),则它是单射不是满射。
正确
错误
参考答案:
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相关题目
【判断题】 设函数f: S?R+, S=(0, 1), f(x)=1/x,则它是单射不是满射。
①  正确
②  错误
【简答题】 设函数f: S?R, S=[0, +∞), f(x)=1/(x+1),试求其单满双射性质。
【多选题】 设函数f: S?R, S=[0, +∞), f(x)=1/(x+1),则它是:
①  满射;
②  单射;
③  双射;
④  函数.
【简答题】 设函数f: S?R+, S=(0, 1), f(x)=1/x,试求其单满双射性质。
【判断题】 设函数f: Z?N, f(x)=|x|,则它是满射不是单射。
①  正确
②  错误
【多选题】 设函数f: S?R+, S=(0, 1), f(x)=1/x,则它是:
①  满射;
②  单射;
③  双射;
④  函数.
【简答题】 设函数f: R?R, f(x)=x,试求其单满双射性质。
【简答题】 设函数f: N?N, f(x)=2x+1,试求其单满双射性质。
【简答题】 设函数f: R+?R+, f(x)=2x,试求其单满双射性质。
【简答题】 设函数f: R+?R+, f(x) = x2,试求其单满双射性质。
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