2022年数学同步练习题考试题试卷教案第8届希望杯数学邀请赛初二第2试试题答案 .pdf
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1、希望杯第八届(1997年)初中二年级第二试试题答案提示一、选择题题号:答案1:C 2:D 3:A 4:A 5:D 6:D 7:A 8:B 9:B 10:C 提示:2x2y22x4y 3(x2 2x1)(y24y4)(x1)2(y2)2(x1)(y2)(x1)(y 2)(xy1)(xy3),选(D)3角 DOE 的对称轴是它的角平分线;等边三角形FGH 的对称轴有三条,它们是三边的垂直平分线;线段MN 的对称轴是 MN 的垂直平分线,只有直角三角形ABC 不是轴对称图形选(A)ba B A,B为锐角同理,若 a c,可知 bc,B A,B为锐角,选(A)M 1P1N1 M PN,选(D)6 m2
2、m 10 m2 m 1 m3 2m21997 m(m2m)m21997m m2199711997 1996,选(D)7设 AC 与A1B相交于 O,在 ABO 和 A1CO 中,AOB A1OC,又 ACD ABC A,文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 Z
3、S3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8
4、K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 Z
5、S3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8
6、K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 Z
7、S3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8
8、K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J4文档编码:CE3N8K6G4E4 HT8S8M3T9X2 ZS3Z6V9D9J48如图 9在AB 上取 AFAD,连接 EF DAE FAE,AE AE,ADE AFE AFE DADBC,C180 D BFE 又 FB
9、E CBE,BE BE,BEF BEC BFBC ABAFFBAD BC 选(B)9如图 10,由 A作AE BC,垂足为 E又 S菱形 ABCDBC AE,AC BD AB2 ABC 30,BAD 150,选(B)10设训练后回男队的10人中有 c个女队员,则男队中女队员的人数ac此时,女队中应有男队员的人数为b10(10c)c(人)a b,选(C)二、填空题题号:答案11:1 12:24 13:1817:0 18:7 19:2620:5.5 提示:11 a33a23a20 文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10
10、HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 Z
11、J7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编
12、码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C1
13、0 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2
14、 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文
15、档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9
16、C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8(a1)310(a1)3 1 a 1 1(a1)1996(a1)1997(a1)19981(1)1113如图 3,设 Bx,AB AC,C Bx AD DB DAB Bx CAD 中,CA CD,ABC 中,B C BAC 180,x 36,DAE BAE BAD(90 36)36 1814如图 11,在 AC 上取 AE AB,连接 DE BAD EAD,AD AD,ABD A
17、ED AE AB,BD DE ABC 中,BAC 90,B2C B60,C30又 AED 60,C30 EDC 30,EC ED BD 文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5
18、P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H
19、8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2
20、T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7
21、R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D
22、9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2
23、C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8同理可得方程组 a5 2a41996a3 a3(a2 2a1)1997a3a3(a1)21997a31997a31997a301
24、8如图 12,自 A作AD BC,交 BC 于DABD 中,B60,AB 8,则 CD 1,ED 1文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码
25、:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10 HV7N3V7R5P2 ZJ7K6M6D9H8文档编码:CH4Y2C2T9C10
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