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已知定义在满足:对任意x∈=2f(x)成立.当x∈=2-x.给出如下四个结论:①对任意m∈
已知定义在满足:对任意x∈=2f(x)成立.当x∈=2-x.给出如下四个结论:①对任意m∈
发布时间:2021-02-20 13:20:19
已知定义在(0,+∞)上的函数f(x)满足:对任意x∈(0,+∞),恒有f(2x)=2f(x)成立,当x∈(1,2]时,f(x)=2-x,给出如下四个结论:
①对任意m∈N,有f(2m)=0;
②函数f(x)的值域为[0,+∞);
③存在n∈N,使得f(2n+1)=9;
④“函数f(x)在区间(a,b)上单调递减”的充要条件是“存在k∈N,使得(a,b)(2k,2k+1)”;
则其中正确的结论是
[ ]
A.①②③
B.②③④
C.①③④
D.①②④
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