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ǰλãҳ > 中考数学试题分项版解析汇编第期专题函数的图像与性质含解? - 百度文库

中考数学试题分项版解析汇编第期专题函数的图像与性质含解? - 百度文库

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  • 2025/7/9 14:31:14

P24C6

4ɵ 32?k???4?2k?b???3 ??416?6k?b?b???3?3?ֱPCıʽΪy=

216x+ 33㣺1һκĽ⣻2ϵһκʽ3ͼα仯ƽ

52017ɽʡӪе22⣩ͼһκy=kx+bͼֱAB㣬뷴y=

nͼڵһ޵ĽΪCCDxᣬΪDOB=3OD=6AOBΪ3 x1һκ뷴Ľʽ

ѧ ϰ

25

ƷƷ

2ֱдx0ʱkx+b

n0Ľ⼯ x

𰸡1y=

212x2y= 20x6 3x2x0ʱkx+b

n0Ľ⼯0x6 x㣺1ϵĽʽ2һκͺͷĽ⣬3ͼӦ

ѧ ϰ

26

ƷƷ

6. 2017ɽʡ̩е28⣩ͼǽy??xƽƺõߣԳΪx?1xһΪA(?1,0)һΪByύΪC

2

1ߵĺʽ

2NΪһ㣬BC?NCNꣻ 3Pһ㣬Qһκy?33x?ͼһ㣬ıOAPQΪƽıΣ22ĵPQǷڣڣֱPQ꣬ڣ˵ɣ

1153152

𰸡1y=x+2x+32143PQǣ03132424

2y=x2+2x+3x=0y=3Cǣ03OC=3 Bǣ30 OB=3

OC=OBOBCǵֱΣ

ѧ ϰ

27

ƷƷ

OCB=45㣬

NNHyᣬH ߡNCB=90㣬 NCH=45㣬 NH=CH

HO=OC+CH=3+CH=3+NH

Nǣaa2+2a+3 a+3=a+2a+3 a=0ȥa=1 Nǣ14

2

㣺κۺ

72017Ĵʡڽе21⣩֪A42Bn4һκy=kx+bͷy?ͼ㣮

1һκͷĽʽ 2AOB

3۲ͼֱдʽkx?b?mxm?0Ľ⼯ x ѧ ϰ

28

ƷƷ

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P24C64ɵ 32?k???4?2k?b???3 ??416?6k?b?b???3?3?ֱPCıʽΪy=216x+ 33㣺1һκĽ⣻2ϵһκʽ3ͼα仯ƽ 52017ɽʡӪе22⣩ͼһκy=kx+bͼֱAB㣬뷴y=nͼڵһ޵ĽΪCCDxᣬΪDOB=3OD=6AOBΪ3 x1һκ뷴Ľʽ ѧ ϰ 25 ƷƷ 2ֱдx0ʱkx+bn0Ľ⼯ x 𰸡

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