由題意可知函數(shù)f(x)=3cos(?x+θ)對任意的x都有f(x)=f(2-x),
所以函數(shù)關于x=1對稱,就是f(1)是函數(shù)的最值,所以f(1)=±3.
故選A.
若函數(shù)f(x)=3cos(?x+θ)對任意的x都有f(x)=f(2-x),則f(1)等于( ?。?A.±3 B.0 C.3 D.-3
若函數(shù)f(x)=3cos(?x+θ)對任意的x都有f(x)=f(2-x),則f(1)等于( ?。?br/>A. ±3
B. 0
C. 3
D. -3
B. 0
C. 3
D. -3
數(shù)學人氣:788 ℃時間:2020-06-24 14:50:14
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