2021-2022学年齐齐哈尔市中考数学押题卷含解析及点睛

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17...ᱥḄ-᪆y=-x2+2x+l.(2)Vy=-x2+2x+l=-(x-1)2+4,SMḄᙶ᪗(1,m),ᑣCM=J(—0)2+(J3)2,AC=7[O-(-l)]2+(3-O)2=VlO.AM=/[l-(-l)]2+(-0)2.Amᑖὃ⇋zজNACM=90஺ᨵAM2=AC2+CM2,BP4+m2=10+l+(m-1)2,-^zm=|,...MḄᙶ᪗(1,|)BঝNCAM=90஺WCM2=AM2+AC2,BP1+(m-1)2=4+m2+10,2-^zm=-y,2.,.MḄᙶ᪗(1,-§).o2QᡠzMAC+MḄᙶ᪗(1,ᡈ(1,-§).ூ௃⚪ὃ6ᦪḄᔠ⚪-⚪Ḅᐵ¡ᦪ¢x6ᦪ-᪆ஹ6ᦪ£¤ḄḄᙶ᪗ᱯ¦W§¨ᳮ©ª«.,ஹ33-6-21ஹ(1)y=--x+-,y=—;(2)12;(3)x<-20

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