【简答题】【消耗次数:1】
设函数f: R+?R+, f(x)=2x,试求其单满双射性质。
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相关题目
【简答题】 设函数f: R+?R+, f(x) = x2,试求其单满双射性质。
【简答题】 设函数f: R+?R, f(x)=x2-3x-5,试求其单满双射性质。
【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。
【简答题】 设函数f: R?R, f(x)=x,试求其单满双射性质。
【多选题】 设函数f: R+?R+, f(x) = x^2,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, +∞), f(x)=1/(x+1),试求其单满双射性质。
【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: N?N, f(x)=2x+1,试求其单满双射性质。
【多选题】 设函数f: R+?R, f(x)=log x,则它是:
①  满射;
②  单射;
③  双射;
④  函数.
【多选题】 设函数f: R+?R, f(x)=x^2-3x-5,则它不是:
①  满射;
②  单射;
③  双射;
④  函数.
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①  正确
②  错误
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