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在平面直角坐标系中,横坐标、纵坐标均为整数的点称为整点,如果函数f(x)的图象恰...
在平面直角坐标系中,横坐标、纵坐标均为整数的点称为整点,如果函数f(x)的图象恰好通过n(n∈N
+)个整点,则称函数f(x)为n阶整点函数.有下列函数:
①f(x)=sin2x;
②g(x)=x
3;
③
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;
④φ(x)=lnx.
其中是一阶整点函数的是( )
A.①②③④
B.①③④
C.①④
D.④
考点分析:
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