2022年湖南省长沙市中考数学试卷（附答案详解）

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2022
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ᐳ21⚓

18E.25.ூᫀ௃"পজ,t=l,1,,3•*-T0³
¬ᦪy=kx+bᙠ´3µµ£+·ᨵᨬᜧ°”=¸+஽+ºᨵᨬ±°N=kt—k+b,2
•
h=k3k<0³
¬ᦪy=fcx+bᙠt-1<%lH't,BP1

19ͳM=-(t-|-2)2+4+fc,N=—´+3-27+4+k,•¾=£—2,¾Ḅᨬ±°aᵫ⚪)5=4+k,"k=-|;ঝ²t+2³,ᓽtw|ͳN=-(-l-2)2+4+fc,M=-(t+1-2)2+4+k,t•¾=2—C,•/IḄᨬ±°Ïᵫ⚪)=4+k,"k=-g;ঞ²B(J2

20ூ"᪆௃(1)জᵫ⚪rJM=6066,N=2022,jᵫcÚ)r¾Ḅ°5ঝᑖÛÜÝÞßnঝ²A>0³
M=kt+k+b,N=kt—3k+b,h=kk<0³
M=kt—^k+b,ᨵ)=¸+%+2),h=Bfc(2)ᑖÛÜÝÞßn²t521³
M=",N=*
ᑣ=-J-,ᡠvhᨵᨬᜧ°3²t-t+r1³
M=2,N=3iᑣ=1ញ
)r¾Ḅ,°0Wh<5,NN***2ZC+1N/0)âḄᨬᜧ°W(3)ᑖQÜÝÞßn:জ²2