ʱ : 2018年广西贵港市平南县中考数学三模试?- 百度文库ϿʼĶ
2018ƽпѧģԾ
һѡ⣨12С⣬ÿС3.36֣ÿСⶼΪĸѡֻһȷģ뿼2BǦڴϽѡĴ𰸱Ϳ
13֣5෴ǣ A5
B
C
D5
23֣ʽֽǣ Ax9x+3x3 Bx+4x+4x+2 Cabababab
2
2
2
2
2
D3xx3+3xx33x+1
33֣ˮδʯˮ鲻ϵһʯͷϣ꣬ʯͷγһΪ0.000000068cmС0.000000068ÿѧɱʾΪ A6.810
9
B6.810
8
C6.810
6
D6.810
5
43֣ĸĸͼͼһµǣ
A B
C D
53֣ijУ涨ѧѧۺϳɼΪ100֣жοɼռ40%ĩɼռ60%СĶοڿɼֱ90֣95֣Сۺϳɼǣ A92
B93
C94
D95
63֣ƽֱϵУP12ƽ2λȵõP1P1
ԭʱת90õP2P2ǣ A23
B23
2
C23 D23
73֣xһԪη̣k+1x+2k+1x+k20ʵkȡֵΧϱʾȷǣ
1ҳ8ҳ
AC
BD
83֣ȷǣ AεĶԽഹֱ BεĶԽ
CԽഹֱȵƽı DһԱƽУһԱȵıƽı
93֣ͼԲOBCԲOڵRtABCڲBAC90㣬OA1BC8ԲOֱǣ
A3
B4
C
D10
103֣ǽϹͼʾͼ֪ABC12DEFGֱBCADBECEе㣬СʱÿζABCڲӰֵĸǣ
A
B
C
D
113֣ͼڱ߳Ϊ2ABCDУA60㣬MADߵе㣬NABһ㣬AMNMNڵֱ߷۵õAMNACACȵСֵǣ
2ҳ8ҳ
A B C D2
2
123֣κͼͼĸۣabc04acb03b+2c0mam+babȷǣ
A1
B2
C3
D4
⣨6С⣬ÿС3֣18֣ 133֣
ƽΪ
2
2
143֣֪ʽ3x2x+6ֵ983x+2xֵΪ
153֣ͼֱabֱABCĶBֱaϣC90㣬Ϧ30㣬ϦµĶ
163֣ͼһֱ2
ԲƤִмһԲܽ90
ABCøƤΧһԲԲĵԲİ뾶Ϊ ף
173֣ͼıABCDУABC30㣬DCBƵC˳ʱת60DĶӦǡAغϣõACEAB6BC8BD
3ҳ8ҳ
183֣x4ʱy2x+bͼһںyͼ·bȡֵΧ
⣨8С⣬66֣ 1910֣1㣺1
2018
+|
1
2|6tan30
2Ȼֵ1£ѡһǡxֵֵ
205֣ͼʾABCУDACϵһ㣮
1ADΪһߣABCADEʹADEBDEABڵEҪó߹ͼͼۼд 2AB4AD1BC3DEij
216֣֪y4͵B2a㣮 1һκĽʽ
2ֱABƽ2λõֱly1k1x+b1k10l뷴yͼֱཻдʹy1
ȡֵΧ
ͼһκykx+bk0ͼڵA3
4ҳ8ҳ