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1、一九七八年(理科考生五,六两题选做一题。文科考生五,六两题选做一题,不要求做第七题。)一(下列各题每题 4 分,五个题共 20 分)1分解因式:x2-4xy+4y2-4z2.解:原式=(x-2y)2-(2z)2=(x-2y-2z)(x-2y+2z)2.已知正方形的边长为a,求侧面积等于这个正方形的面积,高等于这个正方形边长的直圆柱体的体积。解:设底面半径为r,则底面周长 2r=a则.42,2222aaaarar体积3求函数)2lg(xy的定义域。解:lg(2+x)0,2+x1.故 x-1 为其定义域。4不查表求 cos800cos350+cos100cos550的值。解:原式=sin100co
2、s350+cos100sin350=sin(100+350)=sin450=225.化简:二.(本题满分 14 分).254:.)()1.0()4(4121214323121bbaab原式解已知方程 kx2+y2=4,其中 k 为实数。对于不同范围的 k 值,分别指出方程所代表图形的内形,并画出显示其数量特征的草图。解:1)k0时,方程的图形是椭圆,中心在坐标原点,此时又可分为:k1 时,长轴在 y 轴上,半长轴=2,半短轴=k2;k=1 时,为半径 r=2 的圆;k1 时,长轴在 x 轴上,半长轴=k2,半短轴=2。如图:2)k=0 时,方程为 y2=4。图形是两条平行于x 轴的直线2y如图
3、。3)k0 时,方程为 Y Y Y k=2 A k=1 (0,2)k=1/4 O A X O B X O X 14422ykx文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7
4、X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7
5、Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S1
6、0M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编
7、码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X
8、3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D
9、10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7这时图形是双曲线,中心在坐标原点,实轴在y
10、 轴上。如图:三(本题满分 14 分)(如图)AB是半圆的直径,C是半圆上一点,直线 MN 切半圆于C点,AM MN 于 M点,BN MN 于 N点,CD AB于 D点,求证:1)CD=CM=CN.2)CD2=AM BN1)证:连 CA,CB,则 ACB=900。ACM=ABC ACD=ABCACM=ACD。AMC ADCCM=CD 同理 CN=CD。CD=CM=CN。2)CD AB,ACD=900。CD2=AD DB由 1)知 AM=AD,BN=BD。CD2=AM BN。Y Y y=2 k=-4 A O O X B X y=-2 M C N A B D 文档编码:CJ7X3M1P3D10 H
11、R8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6
12、T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 Z
13、I7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8
14、S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文
15、档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ
16、7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P
17、3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7四(本题满分 12 分)五(本题满分 20 分)已知 ABC 的三内角的大小成等差数列,tgAtgC=32求角 A,B,C的大小。又已知顶点C的对边 c 上的高等于34。求三角形各边a,b,c的长(提示:必
18、要时可验证324)31(2)六(本题满分 20 分).22log18log9log5log218log95log45log.5log,518:.45log.518),2(9log18181818181836183618ababaabb解求已知.43460cos45cos;6445sin34;860sin34,347545120,45.32,1,32,1:.032)33(xtgCtgA,(2)(1)(2).33)3)(3-(-1C)AtgAtgC)tg(-(1tgCtgA(1)32120,60.2180:212abDBADcbacCAtgCtgACAxxxtgAtgCCABCABCBA上的高等于
19、又知则得设解这方程得的两根是可知由而又解.22:0,2sin2-3sin2,1sin2sin3,:22求证且为锐角已知文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 Z
20、I7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8
21、S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文
22、档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ
23、7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P
24、3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 H
25、R8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7七(本题满分 20 分,文科考生不要求作此题)已知
26、函数 y=x2+(2m+1)x+m2-1(m 为实数)1)m是什么数值时,y 的极值是 0?2)求证:不论 m是什么数值,函数图象(即抛物线)的顶点都在同一条直线 L1上。画出 m=-1、0、1 时抛物线的草图,来检验这个结论。3)平行于 L1的直线中,哪些与抛物线相交,哪些不相交?求证:任一条平行于 L1而与抛物线相交的直线,被各抛物线截出的线段.21sin3)cos(sinsin3)cossin3(cos)sin3(sin2sincos2cossin)2sin()(31sin.1sin9sin9cossin9cos2sin.cossin32sin232sin:,02sin22sin3.2c
27、ossin3:,1sin2sin3222242222222为锐角得由得由.)23(49,)21(45,)21(41,1,0,1.,.43:,45454,21212m-x),454,212(.245,054,0.4544542122222图略之间函数关系为时当直线上抛物线的顶点都在这条是什么值不论因此方程中不含直线它的图象是一条所满足的方程此即各抛物线顶点坐标二式相减得即坐标为函数图象抛物线的顶点时所以当极值为的极小值为xyxyxyyxmmmyxmmymmmmmmymmxy文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR
28、8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T
29、7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI
30、7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S
31、10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档
32、编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7
33、X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3
34、D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7都相等。解:用配方法得:3.设 L:x-y=a为任一条平行于 L1的直线。与抛物线 y=x2+(2m+1)x+m2-1 方程联立求解,消去y,得x2+2mx+m2-1+a=0(x+m)2=1-a。因而当 1-a0 即a1 时,直线 L 与抛物线相交,而a1 时,直线 L 与抛物线不相交。而这
35、与 m无关。因此直线 L 被各抛物线截出的线段都相等。一九七八年副题1(1)分解因式:x2-2xy+y2+2x-2y-3解:原式=(x-y-1)(x-y+3)(2)求的值65cos4030sin2ctgtg)1(222)1()1(45,1.1,1.1,1aamamLLamamLamxa于被抛物线截出的线段等直线它的倾斜角为的斜率为因直线为与抛物线两交点横坐标即直线时当文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 Z
36、I7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8
37、S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文
38、档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ
39、7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P
40、3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 H
41、R8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6
42、T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7解:原式=3/4。(4)已知直圆锥体的底面半径等于1cm,母线的长等于2cm,求它的体积。解:)(3312131322cmV.)35()9125(30)5001()52(10)5(2121211的值计算解:原式=30。2已知两数 x1,x2满足下列条件:1)它们的和是等差数列1,3,的第 20 项;2)它们的积是等比数列2,-6,的前 4 项和。求根为211,1xx的方程。略解:x1+x2=39
43、,x1x2=-40。故:1/x1+1/x2=-39/40。1/x11/x2=-1/40所求方程为:40 x2+39x-1=0.3.已知:ABC的外接圆的切线AD交 BC的延长线于 D点,求证:为所求之定义域且且解的定义域求函数12.01,0525:.1)525lg()3(xxxxyxx文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 Z
44、I7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8
45、S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文
46、档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ
47、7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P
48、3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 H
49、R8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6
50、T7X8 ZI7Y6H8S10M7文档编码:CJ7X3M1P3D10 HR8F7P6T7X8 ZI7Y6H8S10M7CDBDACABACDABC22的面积的面积证:因为 AD是ABC 的外接圆的切线,所以 B=1ABD CAD22ACABACDABC的面积的面积作 AE BD于点 E,则.2121CDBDAECDAEBDACDABC的面积的面积4(如图)CD是 BC的延长线,AB=BC=CA=CD=a,DM 与 AB,AC分别交于 M点和 N点,且BDM=。求证:tgatgCNtgatgBM34,34证:作 ME DC于 E,由ABC是等边三角形,在直角 MBE 中,类似地,过 N作 NF