初三数学期末抛物线汇编

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1.xOyy=x2?2ax+bxPx1mQx2mx11a=1. m=bx1x2. yx4.2cx1?c?1x2?c+7m_1 x1=0x2=2. 42m?161y=x2?2ax+bx=0.b=a2.a=1b=1.y=x2?2x+1.m=b=1x2?2x+1=1x1=0x2=2y=x?12+k.x=1x430x.3?12+k=0k=?4.4.2m?162.xOyA?31B?11Cmnn1ABCD1D2D3.1m=?1n=3D1D2D3_.2CABD1D2D3?C.11.?33 2.13 3.?3?1211.?33 2.13 3.?3?12.CABD1D2D3ABx=?2D1D2y=nD1D2Cm=?2C?2n.D1?4nD20nD3?22?n.D3D3.y=ax+22+2?n.x=?1y=1a=n?1.y=n?1x+22+2?n.x=0y=4n?1+2?n=3n?2=nn=1n1.C.