專題3.1函數(shù)的概念及其表示練基礎(chǔ)練基礎(chǔ)1．（2021·四川達州市·高三二模（文））已知定義在R上的函數(shù)SKIPIF1<0滿足，SKIPIF1<0，則SKIPIF1<0（）A．SKIPIF1<0 B．1 C．SKIPIF1<0 D．SKIPIF1<02．（2021·浙江高一期末）已知SKIPIF1<0則SKIPIF1<0（）A．7 B．2 C．10 D．123．（2021·全國高一課時練習）設(shè)SKIPIF1<0，則SKIPIF1<0的值為（）A．16 B．18 C．21 D．244．（2021·浙江湖州市·湖州中學高一開學考試）若函數(shù)SKIPIF1<0的定義域和值域都是SKIPIF1<0，則SKIPIF1<0（）A．1 B．3 C．SKIPIF1<0 D．1或35．（上海高考真題）若是的最小值，則的取值范圍為().A．[-1,2] B．[-1，0] C．[1，2] D．SKIPIF1<06．（廣東高考真題）函數(shù)SKIPIF1<0的定義域是______．7.（2021·青海西寧市·高三一模（理））函數(shù)SKIPIF1<0的定義域為SKIPIF1<0，圖象如圖1所示，函數(shù)SKIPIF1<0的定義域為SKIPIF1<0，圖象如圖2所示.若集合SKIPIF1<0，SKIPIF1<0，則SKIPIF1<0中有___________個元素.8．（2021·湖北襄陽市·襄陽五中高三二模）已知函數(shù)SKIPIF1<0的定義域是SKIPIF1<0，則函數(shù)SKIPIF1<0的定義域是_______．9．（2021·黑龍江哈爾濱市第六中學校高三二模（文））已知函數(shù)SKIPIF1<0，若SKIPIF1<0，則實數(shù)SKIPIF1<0___________.10.（2021·云南高三二模（理））已知函數(shù)SKIPIF1<0，若SKIPIF1<0，且SKIPIF1<0，設(shè)SKIPIF1<0，則SKIPIF1<0的取值范圍為________.練提升TIDHNEG練提升TIDHNEG1．（2021·云南高三二模（文））已知函數(shù)SKIPIF1<0，若SKIPIF1<0，且SKIPIF1<0，設(shè)SKIPIF1<0，則（）A．SKIPIF1<0沒有最小值 B．SKIPIF1<0的最小值為SKIPIF1<0C．SKIPIF1<0的最小值為SKIPIF1<0 D．SKIPIF1<0的最小值為SKIPIF1<02．（2020·全國高一單元測試）已知函數(shù)SKIPIF1<0，若SKIPIF1<0，則SKIPIF1<0的取值集合是（）A．SKIPIF1<0 B．SKIPIF1<0C．SKIPIF1<0 D．SKIPIF1<03．【多選題】（2021·全國高一課時練習）（多選題）下列函數(shù)中，定義域是其值域子集的有（）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<04．【多選題】（2021·全國高一課時練習）已知f(x)=SKIPIF1<0，則f(x)滿足的關(guān)系有（）A．SKIPIF1<0 B．SKIPIF1<0=SKIPIF1<0C．SKIPIF1<0=f(x) D．SKIPIF1<05．【多選題】（2021·全國高三其他模擬）已知函數(shù)SKIPIF1<0令SKIPIF1<0，則下列說法正確的是（）A．SKIPIF1<0 B．方程SKIPIF1<0有3個根C．方程SKIPIF1<0的所有根之和為－1 D．當SKIPIF1<0時，SKIPIF1<06．【多選題】（2021·全國高三專題練習）已知函數(shù)SKIPIF1<0，SKIPIF1<0，對于任意的SKIPIF1<0，SKIPIF1<0，則（）A．SKIPIF1<0的圖象過點SKIPIF1<0和SKIPIF1<0B．SKIPIF1<0在定義域上為奇函數(shù)C．若當SKIPIF1<0時，有SKIPIF1<0，則當SKIPIF1<0時，SKIPIF1<0D．若當SKIPIF1<0時，有SKIPIF1<0，則SKIPIF1<0的解集為SKIPIF1<07．【多選題】（2021·全國高三專題練習）已知函數(shù)SKIPIF1<0，則（）A．SKIPIF1<0B．若SKIPIF1<0，則SKIPIF1<0C．SKIPIF1<0在SKIPIF1<0上是減函數(shù)D．若關(guān)于SKIPIF1<0的方程SKIPIF1<0有兩解，則SKIPIF1<08．（2021·浙江高三月考）已知SKIPIF1<0，設(shè)函數(shù)SKIPIF1<0，存在SKIPIF1<0滿足SKIPIF1<0，且SKIPIF1<0，則SKIPIF1<0的取值范圍是______.9.（2021·浙江高一期末）已知函數(shù)SKIPIF1<0，SKIPIF1<0，SKIPIF1<0．（1）在圖SKIPIF1<0中畫出函數(shù)SKIPIF1<0，SKIPIF1<0的圖象；（2）定義：SKIPIF1<0，用SKIPIF1<0表示SKIPIF1<0，SKIPIF1<0中的較小者，記為SKIPIF1<0，請分別用圖象法和解析式法表示函數(shù)SKIPIF1<0．（注：圖象法請在圖SKIPIF1<0中表示，本題中的單位長度請自己定義且標明）10.（2021·全國高一課時練習）已知函數(shù)SKIPIF1<0，SKIPIF1<0.（1）在平面直角坐標系里作出SKIPIF1<0、SKIPIF1<0的圖象.（2）SKIPIF1<0，用SKIPIF1<0表示SKIPIF1<0、SKIPIF1<0中的較小者，記作SKIPIF1<0，請用圖象法和解析法表示SKIPIF1<0；（3）求滿足SKIPIF1<0的SKIPIF1<0的取值范圍.練真題TIDHNEG練真題TIDHNEG1.（山東高考真題）設(shè)fx=x,0<x<12A．2B．4C．6D．82.（2018上海卷）設(shè)D是含數(shù)1的有限實數(shù)集，fx是定義在D上的函數(shù)，若fx的圖象繞原點逆時針旋轉(zhuǎn)π6后與原圖象重合，則在以下各項中，fA．3B．32C．333.（2018年新課標I卷文）設(shè)函數(shù)fx=2?x?，A.?∞?，???1B.04.（浙江高考真題（文））已知函數(shù)SKIPIF1<0，則SKIPIF1<0，SKIPIF1<0的最小值是．5.（2018·天津高考真題（文））已知SKIPIF1<0