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平面幾何(崇文·理·題3)已知SKIPIF1<0是SKIPIF1<0的切線,切點(diǎn)為SKIPIF1<0,SKIPIF1<0,SKIPIF1<0是SKIPIF1<0的直徑,SKIPIF1<0交SKIPIF1<0于點(diǎn)SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的半徑為()A.SKIPIF1<0
B.SKIPIF1<0
C.SKIPIF1<0
D.SKIPIF1<0C;SKIPIF1<0于是圓的半徑為SKIPIF1<0.(東城·理·題3)如圖,已知SKIPIF1<0是⊙SKIPIF1<0的一條弦,點(diǎn)SKIPIF1<0為SKIPIF1<0上一點(diǎn),SKIPIF1<0,SKIPIF1<0交⊙SKIPIF1<0于SKIPIF1<0,若SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的長(zhǎng)是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0B;延長(zhǎng)SKIPIF1<0交于圓上一點(diǎn),得到一條圓的弦,易知SKIPIF1<0點(diǎn)為該弦的中點(diǎn),有SKIPIF1<0.(豐臺(tái)·理·題9)在平行四邊形SKIPIF1<0中,點(diǎn)SKIPIF1<0是邊SKIPIF1<0的中點(diǎn),SKIPIF1<0與SKIPIF1<0交于點(diǎn)SKIPIF1<0,若SKIPIF1<0的面積是SKIPIF1<0SKIPIF1<0,則SKIPIF1<0的面積是SKIPIF1<0.4;取SKIPIF1<0的中點(diǎn)SKIPIF1<0,連結(jié)SKIPIF1<0交SKIPIF1<0于SKIPIF1<0,則∵SKIPIF1<0且SKIPIF1<0,∴四邊形SKIPIF1<0為平行四邊形∴SKIPIF1<0∴SKIPIF1<0(海淀·理·題10)如圖,SKIPIF1<0為SKIPIF1<0的直徑,且SKIPIF1<0,SKIPIF1<0為SKIPIF1<0的中點(diǎn),過(guò)SKIPIF1<0作SKIPIF1<0的弦SKIPIF1<0,且SKIPIF1<0,則弦SKIPIF1<0的長(zhǎng)度為.7;由SKIPIF1<0得SKIPIF1<0.由已知和相交弦定理得SKIPIF1<0,解得SKIPIF1<0.于是SKIPIF1<0.(石景山·理·題10)已知曲線SKIPIF1<0的參數(shù)方程為SKIPIF1<0SKIPIF1<0,則曲線SKIPIF1<0的普通方程是;點(diǎn)SKIPIF1<0在曲線SKIPIF1<0上,點(diǎn)SKIPIF1<0在平面區(qū)域SKIPIF1<0上,則SKIPIF1<0的最小值是.SKIPIF1<0,SKIPIF1<0;SKIPIF1<0是圓SKIPIF1<0;不等式組的可行域如圖陰影所示,SKIPIF1<0點(diǎn)為SKIPIF1<0、SKIPIF1<0為SKIPIF1<0時(shí),SKIPIF1<0最短,長(zhǎng)度是SKIPIF1<0.(西城·理·題12)如圖,SKIPIF1<0切SKIPIF1<0于點(diǎn)SKIPIF1<0,割線SKIPIF1<0經(jīng)過(guò)圓心SKIPIF1<0,弦SKIPIF1<0于點(diǎn)SKIPIF1<0.已知SKIPIF1<0的半徑為3,SKIPIF1<0,則SKIPIF1<0.SKIPIF1<0.SKIPIF1<0;SKIPIF1<0;連結(jié)SKIPIF1<0,知SKIPIF1<0,于是SKIPIF1<0,SKIPIF1<0.(宣武·理·題11)若SKIPIF1<0是SKIPIF1<0上三點(diǎn),SKIPIF1<0切SKIPIF1<0于點(diǎn)SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的大小為.SKIPIF1<0;如圖,弦切角SKIPIF1<0,于是SKIPIF1<0,從而SKIPIF1<0.(朝陽(yáng)·理·題12)如圖,圓SKIPIF1<0是SKIPIF1<0的外接圓,過(guò)點(diǎn)SKIPIF1<0的切線交SKIPIF1<0的延長(zhǎng)線于點(diǎn)SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的長(zhǎng)為;SKIPIF1<0的長(zhǎng)為.SKIPIF1<0.SKIPIF1<0.又由SKIPIF1<0知SKIPIF1<0.于是SKIPIF1<0.即SKIPIF1<0.(西城·理·題12)如圖,SKIPIF1<0切SKIPIF1<0于點(diǎn)SKIPIF1<0,割線SKIPIF1<0經(jīng)過(guò)圓心SKIPIF1<0,弦SKIPIF1<0于點(diǎn)SKIPIF1<0.已知SKIPIF1<0的半徑為3,SKIPIF1<0,則SKIPIF1<0.SKIPIF1<0.SKIPIF1<0;SKIPIF1<0;連結(jié)SKIPIF1<0,知SKIPIF1<0,于是SKIPIF1<0,SKIPIF1<0.坐標(biāo)系與參數(shù)方程(海淀·理·題4)在平面直角坐標(biāo)系SKIPIF1<0中,點(diǎn)SKIPIF1<0的直角坐標(biāo)為SKIPIF1<0.若以原點(diǎn)SKIPIF1<0為極點(diǎn),SKIPIF1<0軸正半軸為極軸建立極坐標(biāo)系,則點(diǎn)SKIPIF1<0的極坐標(biāo)可以是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0C;易知SKIPIF1<0,SKIPIF1<0.(朝陽(yáng)·理·題9)已知圓的極坐標(biāo)方程為SKIPIF1<0,則圓心的直角坐標(biāo)是;半徑長(zhǎng)為.SKIPIF1<0;由SKIPIF1<0,有SKIPIF1<0,即圓的直角坐標(biāo)方程為SKIPIF1<0.于是圓心坐標(biāo)為SKIPIF1<0,半徑為1.(崇文·理·題11)將參數(shù)方程SKIPIF1<0(SKIPIF1<0為參數(shù))化成普通方程為
.SKIPIF1<0;由SKIPIF1<0知SKIPIF1<0.(石景山·理·題11)如圖,已知SKIPIF1<0是圓SKIPIF1<0的切線.直線SKIPIF1<0交圓SKIPIF1<0于SKIPIF1<0、SKIPIF1<0兩點(diǎn),SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.則SKIPIF1<0的長(zhǎng)為_____,SKIPIF1<0的大小為________.SKIPIF1<0,SKIPIF1<0;SKIPIF1<0,則SKIPIF1<0;由SKIPIF1<0,可知SKIPIF1<0,即SKIPIF1<0,由SKIPIF1<0,得SKIPIF1<0.(西城·理·題11)將極坐標(biāo)方程SKIPIF1<0化成直角坐標(biāo)方程為.SKIPIF1<0;SKIPIF1<0.(東城·理·題12)圓的極坐標(biāo)方程為SKIPIF1<0,將其化成直角坐標(biāo)方程為,圓心的直角坐標(biāo)為.SKIPIF1<0,SKIPIF1<0;SKIPIF1<0.(東城·理·題12)圓的極坐標(biāo)方程為SKIPIF1<0,將其化成直角坐標(biāo)方程為,圓心的直角坐標(biāo)為.SKIPIF1<0,SKIPIF1<0;SKIPIF1<0.(宣武·理·題12)若直線SKIPIF1<0與曲線SKIPIF1<0(SKIPIF1<0為參數(shù),SKIPIF1<0)有兩個(gè)公共點(diǎn)SKIPIF1<0,且SKIPIF1<0,則實(shí)數(shù)SKIPIF1<0的值為;在此條件下,以直角坐標(biāo)系的原點(diǎn)為極點(diǎn),SKIPIF1<0軸正方向?yàn)闃O軸建立坐標(biāo)系,則曲線SKIPIF1<0的極坐標(biāo)方程為.SKIPIF1<0;曲線SKIPIF1<0:SKIPIF1<0,點(diǎn)SKIPIF1<0到SKIPIF1<0的距離為SKIPIF1<0,因此SKIPIF1<0;SKIPIF1<0,即SKIPIF1<0.(豐臺(tái)·理·題12)在平面直角坐標(biāo)系SKIPIF1<0中,直線SKIPIF1<0的參數(shù)方程為SKIPIF1<0(參數(shù)SKIPIF1<0),圓SKIPIF1<0的參數(shù)方程為SKIPIF1<0(參數(shù)SKIPIF1<0),則圓心到直線SKIPIF1<0的距離是.SKIPIF1<0;直線方程為SKIPIF1<0,圓的方程為SKIPIF1<0.于是圓心SKIPIF1<0到直線SKIPIF1<0的距離為SKIPIF1<0.復(fù)數(shù)(海淀·理·題1)在復(fù)平面內(nèi),復(fù)數(shù)SKIPIF1<0(SKIPIF1<0是虛數(shù)單位)對(duì)應(yīng)的點(diǎn)位于()A.第一象限B.第二象限C.第三象限D(zhuǎn).第四象限C;SKIPIF1<0,該復(fù)數(shù)對(duì)應(yīng)的點(diǎn)位于第三象限.(豐臺(tái)·理·題1)如果SKIPIF1<0為純虛數(shù),則實(shí)數(shù)SKIPIF1<0等于()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0或SKIPIF1<0D;設(shè)SKIPIF1<0,SKIPIF1<0則SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0或SKIPIF1<0.(石景山·理·題1)復(fù)數(shù)SKIPIF1<0等于()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0C;SKIPIF1<0.(東城·理·題1)SKIPIF1<0是虛數(shù)單位,若SKIPIF1<0,則SKIPIF1<0的值是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0C;SKIPIF1<0,于是SKIPIF1<0.(朝陽(yáng)·理·題1)復(fù)數(shù)SKIPIF1<0等于()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0D;計(jì)算容易有.(海淀·文·題1)在復(fù)平面內(nèi),復(fù)數(shù)SKIPIF1<0(SKIPIF1<0是虛數(shù)單位)對(duì)應(yīng)的點(diǎn)位于()A.第一象限B.第二象限C.第三象限D(zhuǎn).第四象限A;SKIPIF1<0,對(duì)應(yīng)的點(diǎn)為SKIPIF1<0位于第一象限.(豐臺(tái)·文·題1)復(fù)數(shù)SKIPIF1<0化簡(jiǎn)的結(jié)果等于()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0A;SKIPIF1<0SKIPIF1<0.(石景山·文·題1)復(fù)數(shù)SKIPIF1<0等于()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0C;SKIPIF1<0.(東城·文·題1)計(jì)算復(fù)數(shù)SKIPIF1<0的結(jié)果為()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0A;SKIPIF1<0.(朝陽(yáng)·文·題1)復(fù)數(shù)SKIPIF1<0等于()A.2B.-2 C.SKIPIF1<0 D.SKIPIF1<0C;SKIPIF1<0.(宣武·理·題3)若復(fù)數(shù)SKIPIF1<0滿足SKIPIF1<0,則SKIPIF1<0對(duì)應(yīng)的點(diǎn)位于()A.第一象限 B.第二象限 C.第三象限 D.第四象限B;SKIPIF1<0.(宣武·文·題4)設(shè)SKIPIF1<0是虛數(shù)單位,則復(fù)數(shù)SKIPIF1<0所對(duì)應(yīng)的點(diǎn)落在()A.第一象限 B.第二象限 C.第三象限 D.第四象限B;SKIPIF1<0.(西城·文·題9)SKIPIF1<0是虛數(shù)單位,SKIPIF1<0.SKIPIF1<0;SKIPIF1<0.(西城·理·題9)若SKIPIF1<0,其中SKIPIF1<0,SKIPIF1<0為虛數(shù)單位,則SKIPIF1<0.3;SKIPIF1<0SKIPIF1<0.(崇文·理·題9)如果復(fù)數(shù)SKIPIF1<0(其中SKIPIF1<0是虛數(shù)單位)是實(shí)數(shù),則實(shí)數(shù)SKIPIF1<0___________.SKIPIF1<0;SKIPIF1<0.于是有SKIPIF1<0.(崇文·文·題10)如果復(fù)數(shù)SKIPIF1<0(其中SKIPIF1<0是虛數(shù)單位)是實(shí)數(shù),則實(shí)數(shù)SKIPIF1<0___________.-1;SKIPIF1<0.于是有SKIPIF1<0.算法(豐臺(tái)·文·題3)在右面的程序框圖中,若SKIPIF1<0,則輸出SKIPIF1<0的值是()A.2B.3C.4D.5C;SKIPIF1<0,對(duì)應(yīng)的SKIPIF1<0.(石景山·理·題4)一個(gè)幾何體的三視圖如圖所示,那么此幾何體的側(cè)面積(單位:SKIPIF1<0)為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0A;幾何體如圖,是正四棱錐,底邊長(zhǎng)SKIPIF1<0,側(cè)面底邊上的高為SKIPIF1<0,因此側(cè)面積為SKIPIF1<0.(西城·理·題5)閱讀右面的程序框圖,運(yùn)行相應(yīng)的程序,輸出的結(jié)果為()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0D;SKIPIF1<0;SKIPIF1<0;SKIPIF1<0,SKIPIF1<0,故輸出SKIPIF1<0.(東城·理·題5)如圖是一個(gè)算法的程序框圖,若該程序輸出的結(jié)果為SKIPIF1<0,則判斷框中應(yīng)填入的條件是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0B;循環(huán)一次得:SKIPIF1<0;兩次得:SKIPIF1<0;三次得:SKIPIF1<0;四次得:SKIPIF1<0,此時(shí)需要跳出循環(huán),故填SKIPIF1<0.(東城·文·題5)按如圖所示的程序框圖運(yùn)算,若輸入SKIPIF1<0,則輸出SKIPIF1<0的值是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0B;SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,跳出循環(huán),輸出SKIPIF1<0.(石景山·文·題6)已知程序框圖如圖所示,則該程序框圖的功能是()A.求數(shù)列SKIPIF1<0的前10項(xiàng)和SKIPIF1<0B.求數(shù)列SKIPIF1<0的前10項(xiàng)和SKIPIF1<0C.求數(shù)列SKIPIF1<0的前11項(xiàng)和SKIPIF1<0D.求數(shù)列SKIPIF1<0的前11項(xiàng)和SKIPIF1<0B注意SKIPIF1<0和SKIPIF1<0的步長(zhǎng)分別是SKIPIF1<0和SKIPIF1<0.(西城·文·題6)閱讀右面的程序框圖,運(yùn)行相應(yīng)的程序,輸出的結(jié)果為()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0D;SKIPIF1<0;SKIPIF1<0;SKIPIF1<0,SKIPIF1<0,故輸出SKIPIF1<0.(海淀·理科·題7)已知某程序框圖如圖所示,則執(zhí)行該程序后輸出的結(jié)果是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0A;∵SKIPIF1<0,∴對(duì)應(yīng)的SKIPIF1<0.(朝陽(yáng)·文·題11)如圖,下程序框圖的程序執(zhí)行后輸出的結(jié)果是.55;將經(jīng)過(guò)SKIPIF1<0次運(yùn)行后的SKIPIF1<0值列表如下.于是SKIPIF1<0.SKIPIF1<012345...SKIPIF1<0...10SKIPIF1<023456SKIPIF1<011SKIPIF1<01361015SKIPIF1<055(宣武·文·題12)執(zhí)行如圖程序框圖,輸出SKIPIF1<0的值等于.SKIPIF1<0;運(yùn)算順序如下SKIPIF1<0,輸出SKIPIF1<0,故SKIPIF1<0.(崇文·理·題12)(崇文·文·題12)某程序框圖如圖所示,該程序運(yùn)行后輸出SKIPIF1<0的值分別為
.13,21;依據(jù)程序框圖畫出運(yùn)行SKIPIF1<0次后SKIPIF1<0的值.SKIPIF1<0123SKIPIF1<0234SKIPIF1<02513SKIPIF1<038214次運(yùn)行后SKIPIF1<0,于是有SKIPIF1<0.(豐臺(tái)·理·題13)在右邊的程序框圖中,若輸出SKIPIF1<0的值是SKIPIF1<0,則輸入SKIPIF1<0的取值范圍是.SKIPIF1<0;∵SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0∴要使得剛好進(jìn)行SKIPIF1<0次運(yùn)算后輸出的SKIPIF1<0,則有SKIPIF1<0.(朝陽(yáng)·理·題13)右邊程序框圖的程序執(zhí)行后輸出的結(jié)果是.625;將經(jīng)過(guò)SKIPIF1<0次運(yùn)行后的SKIPIF1<0值列表如下.SKIPIF1<012345...SKIPIF1<0...25SKIPIF1<0357911SKIPIF1<051SKIPIF1<01491625SKIPIF1<0625于是SKIPIF1<0.(海淀·文·題13)已知程序框圖如圖所示,則執(zhí)行該程序后輸出的結(jié)果是_______________.SKIPIF1<0;∵SKIPIF1<0,∴對(duì)應(yīng)的SKIPIF1<0.集合簡(jiǎn)易邏輯推理與證明(崇文·文·題1)已知全集SKIPIF1<0,集合SKIPIF1<0,SKIPIF1<0,則集合SKIPIF1<0()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0D;容易解得SKIPIF1<0或者SKIPIF1<0,SKIPIF1<0.于是SKIPIF1<0SKIPIF1<0.(西城·理·題1)設(shè)集合SKIPIF1<0,SKIPIF1<0,則下列結(jié)論正確的是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0C;SKIPIF1<0,SKIPIF1<0.(宣武·理·題1)設(shè)集合SKIPIF1<0,則下列關(guān)系中正確的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0D;SKIPIF1<0,SKIPIF1<0,故SKIPIF1<0,因此SKIPIF1<0(崇文·理·題1)已知全集SKIPIF1<0,集合SKIPIF1<0,SKIPIF1<0,則集合SKIPIF1<0()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0D;容易解得SKIPIF1<0或者SKIPIF1<0,SKIPIF1<0.于是SKIPIF1<0SKIPIF1<0.(西城·文·題1)設(shè)集合SKIPIF1<0,SKIPIF1<0,下列結(jié)論正確的是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0C;SKIPIF1<0,SKIPIF1<0.(宣武·文·題1)設(shè)集合SKIPIF1<0,則下列關(guān)系中正確的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0D;正確的表示法,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.(東城·理·題2)設(shè)全集SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0等于()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0D;SKIPIF1<0,SKIPIF1<0,故SKIPIF1<0.(石景山·文·題2)已知命題SKIPIF1<0SKIPIF1<0,SKIPIF1<0,那么命題SKIPIF1<0為()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0B;全稱命題的否定是存在性命題,將SKIPIF1<0改為SKIPIF1<0,然后否定結(jié)論.(東城·文·題2)設(shè)集合SKIPIF1<0,SKIPIF1<0,則韋恩圖中陰影部分表示的集合()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0B;陰影部分表示SKIPIF1<0.(豐臺(tái)·理·題2)設(shè)集合SKIPIF1<0,SKIPIF1<0,則集合SKIPIF1<0是()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0C;SKIPIF1<0,SKIPIF1<0,因此SKIPIF1<0.(石景山·理·題2)已知命題SKIPIF1<0SKIPIF1<0,SKIPIF1<0,那么命題SKIPIF1<0為()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0B;全稱命題的否定是存在性命題,將SKIPIF1<0改為SKIPIF1<0,然后否定結(jié)論.(朝陽(yáng)·文·題2)命題SKIPIF1<0,都有SKIPIF1<0,則()A.SKIPIF1<0,使得SKIPIF1<0 B.SKIPIF1<0,使得SKIPIF1<0C.SKIPIF1<0,使得SKIPIF1<0 D.SKIPIF1<0,使得SKIPIF1<0A;由命題的否定容易做出判斷.(海淀·文·題7)給出下列四個(gè)命題:=1\*GB3①若集合SKIPIF1<0、SKIPIF1<0滿足SKIPIF1<0,則SKIPIF1<0;=2\*GB3②給定命題SKIPIF1<0,若“SKIPIF1<0”為真,則“SKIPIF1<0”為真;=3\*GB3③設(shè)SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0;=4\*GB3④若直線SKIPIF1<0與直線SKIPIF1<0垂直,則SKIPIF1<0.其中正確命題的個(gè)數(shù)是()A.1B.2C.3D.4B;命題①和④正確.(豐臺(tái)·文·題7)若集合SKIPIF1<0,
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