2021-2022学年辽宁省大石桥市周家镇中考数学押题卷含解析及点睛

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19(1)ᑭᵨᦪ»ᱥ^᪆(b^CDḄ᪆ᯠ)¿ÀÁ5?"2'¥+3Dᙶ᪗y——x^+2x+3(2)]P(m,-m2+2m+3),ᑣE(m,-—m+3),ᑣPE=-m2+—m,ᑭᵨ☢µÊᑮSAPCD=—x-x(-m2+—m)22222525=.-m2+—m,ᯠ)ᑭᵨ±ËᦪḄឋ⚪48(3)-.4/PC=PEm2+(-m2+2m+3-3)2=(-m2+-m)2/CP=CEm2+(-m2+2m+3-3)2=m2+(--m+3-3)222/EC=EPm2+(--in+3-3)2=(-m2+-)2,ᯠ)ᑖY¿ÀᓽᑮÎÏᩩÑḄmḄ.m22ூ2௃-l-Z?+c=0b=2(1)ÒA(-L0),C(0,3)ᑖYᐭy=-x?+bx+cc=3oc=3»ᱥ^Ḅ᪆y=-x2+2x+3ÒC(0,3)ᐭy=-gx+nn=3,b^CDḄ᪆y=-x+3,1rny=—x+3x=()¿ÀÁ2,_y--x2+2x+31ு³5ᡈ*7457•'Dᙶ᪗(—>—)24(2)¶ᙠ.]P(m,-m2+2m+3),ᑣE(m,-—m+3),2PE=-m2+2m+3-(--m+3)=-m2+--m,22.,L.l..l)=-2(m-Lz+”,SAPCD=(m2+m222484464

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