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    當(dāng)前位置: 高中數(shù)學(xué) / 多選題
    • 1. (2022高一上·金壇期中) (其中a為整數(shù),),則把整數(shù)a叫做離實(shí)數(shù)x最近的整數(shù),并用符號“”表示“離實(shí)數(shù)x最近的整數(shù)為a”.設(shè)函數(shù) , 下列結(jié)論正確的為(    )

      A . B . C . 函數(shù)為偶函數(shù)且其值域?yàn)?img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmo%3E%5B%3C%2Fmo%3E%3Cmrow%3E%3Cmn%3E0%3C%2Fmn%3E%3Cmn%3E++%EF%BC%8C+%3C%2Fmn%3E%3Cmfrac%3E%3Cmrow%3E%3Cmn%3E1%3C%2Fmn%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3Cmo%3E%29%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> D . 函數(shù)圖象的對稱軸方程為

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