新編高中數(shù)學(xué)人教A版必修一 第一章 集合與函數(shù)概念 學(xué)業(yè)分層測評5 含答案
新編人教版精品教學(xué)資料學(xué)業(yè)分層測評(五)補(bǔ)集及綜合應(yīng)用(建議用時:45分鐘)學(xué)業(yè)達(dá)標(biāo)一、選擇題1若全集U0,1,2,3且UA2,則集合A的真子集共有()A3個B5個C7個D8個【解析】A0,1,3,真子集有2317.【答案】C2已知全集UR,Ax|x0,Bx|x1,則集合U(AB)()Ax|x0Bx|x1Cx|0x1Dx|0<x<1【解析】由題意可知,ABx|x0或x1,所以U(AB)x|0x1【答案】D3(2015·天津高考)已知全集U1,2,3,4,5,6,7,8,集合A2,3,5,6,集合B1,3,4,6,7,則集合AUB()A2,5B3,6C2,5,6D2,3,5,6,8【解析】由題意得UB2,5,8,AUB2,3,5,62,5,82,5【答案】A4(2016·中山高一檢測)設(shè)全集U1,2,3,4,5,6,7,8,集合A1,2,3,5,B2,4,6,則圖112中的陰影部分表示的集合為()圖112A2B4,6C1,3,5D4,6,7,8【解析】全集U1,2,3,4,5,6,7,8,集合A1,2,3,5,B2,4,6,由韋恩圖可知陰影部分表示的集合為(UA)B,UA4,6,7,8,(UA)B4,6故選B.【答案】B5(2016·南陽高一檢測)已知集合Ax|xa,Bx|1x2,且A(RB)R,則實數(shù)a的取值范圍是() 【導(dǎo)學(xué)號:97030023】Aa2Ba1Ca2Da2【解析】集合Ax|xa,Bx|1x2,RBx|x1或x2,因為ARBR,所以a2,故選C.【答案】C二、填空題6(2016·杭州模擬)設(shè)集合Sx|x>2,Tx|x23x40,則(RS)T_.【解析】集合Sx|x>2,RSx|x2,由x23x40,得Tx|4x1,故(RS)Tx|x1【答案】(,17已知集合A、B均為全集U1,2,3,4的子集,且U(AB)4,B1,2,則AUB_.【解析】U1,2,3,4,U(AB)4,AB1,2,3,又B1,2,3A1,2,3又UB3,4,AUB3【答案】38設(shè)全集UR,集合Ax|x0,By|y1,則UA與UB的包含關(guān)系是_【解析】UAx|x<0,UBy|y<1x|x<1UAUB.【答案】UAUB三、解答題9(2016·寧波高一檢測)設(shè)AxZ|x|6,B1,2,3,C3,4,5,求:(1)A(BC);(2)AA(BC)【解】A5,4,3,2,1,0,1,2,3,4,5,(1)由BC3,A(BC)A5,4,3,2,1,0,1,2,3,4,5(2)由BC1,2,3,4,5,A(BC)5,4,3,2,1,0,AA(BC)5,4,3,2,1,010設(shè)全集為R,Ax|3x7,Bx|2x10,求:(1)AB;(2)RA;(3)R(AB)【解】(1)Ax|3x7,Bx|2x10,ABx|3x7(2)又全集為R,Ax|3x7,RAx|x3或x7(3)ABx|2x10,R(AB)x|x2或x10能力提升1(2016·石家莊高一檢測)若全集U1,2,3,4,5,6,M2,3,N1,4,則集合5,6等于()AMNBMNC(UM)(UN)D(UM)(UN)【解析】全集U1,2,3,4,5,6,M2,3,N1,4,MN1,2,3,4,則(UM)(UN)U(MN)5,6故選D.【答案】D2已知全集U1,2,3,4,5,集合Ax|x23x20,Bx|x2a,aA,則集合U(AB)中元素個數(shù)為()A1B2C3D4【解析】A1,2,B2,4,AB1,2,4,U(AB)3,5【答案】B3已知全集U2,3,a2a1,A2,3,若UA1,則實數(shù)a的值是_【解析】U2,3,a2a1,A2,3,UA1,a2a11,即a2a20,解得a1或a2.【答案】1或24(2016·哈爾濱師大附中高一檢測)設(shè)全集UR,集合Ax|x2或x5,Bx|x2求(1)U(AB);(2)記U(AB)D,Cx|2a3xa,且CDC,求a的取值范圍. 【導(dǎo)學(xué)號:97030024】【解】(1)由題意知,Ax|x2或x5,Bx|x2,則ABx|x2或x5,又全集UR,U(AB)x|2x5(2)由(1)得Dx|2x5,由CDC得CD,當(dāng)C時,有a2a3,解得a1;當(dāng)C時,有解得a.綜上,a的取值范圍為(1,).