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过两点(﹣1,1)和(3,9)的直线在x轴上的截距是 .
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已知圆C.在x轴上的截距为-1和3在y轴上的一个截距为11求圆C.的标准方程2若过点2-1的直线l被
直线l过点P.411若直线l过点Q.-16求直线l的方程2若直线l在y轴上的截距是在x轴上的截距的2
设抛物线的顶点在坐标原点焦点F.在y轴正半轴上过点F.的直线交抛物线于A.B.两点线段AB的长是8A
已知直线l过点12且在x轴上的截距是在y轴上的截距的2倍则直线l的方程为
x+2y-5=0
x+2y+5=0
2x-y=0或x+2y-5=0
2x-y=0或x-2y+3=0
过点52且在x轴上的截距是在y轴上的截距的2倍的直线方程是
2x+y-12=0
2x+y-12=0或2x-5y=0
x-2y-1=0
x+2y-9=0或2x-5y=0
1求经过点A.32B.-20的直线方程2求过点P-13并且在两轴上的截距相等的直线方程
求过点P.6-2且在x轴上的截距比在y轴上的截距大1的直线方程.
直线回归分析中以直线方程=0.004+0.588X代入两点描出回归线下面选项中哪项正确
所有实测点都应在回归线上
所绘回归直线必过点(X,
原点是回归直线与Y轴的交点
回归直线X的取值范围为(-1,1)
实测值与估计值差的平方和必小于零
已知直线y=-x+5的倾斜角是直线l的倾斜角的大小的5倍分别求满足下列条件的直线l的方程.1过点P.
1设直线l过点23且与直线2x+y+1=0垂直l与x轴y轴分别交于AB两点求|AB| 2求过点A
根据下列条件分别写出直线的方程并化为一般式方程1斜率为且经过点A.532过点B.-30且垂直于x轴3
经过点M.11且在两坐标轴上截距相等的直线是
x+y=2
x+y=1
x=1或y=1
x+y=2或x=y
过两点-11和39的直线在x轴上的截距是
-
-
2
过两点-11和39的直线在x轴上的截距为
-
-
2
根据下列条件求圆的方程.1经过坐标原点和点P.11并且圆心在直线2x+3y+1=0上.2过P.4-2
过点11且在y轴上的截距为3的直线方程是
x+2y﹣3=0
2x﹣y﹣1=0
x﹣2y﹣1=0
2x+y﹣3=0
根据下列条件求圆的方程.1经过坐标原点和点P.11并且圆心在直线2x+3y+1=0上.2过P.4-2
过点P.-12且在x轴上的截距是在y轴上的截距的2倍的直线方程是________.
过点1在两坐标轴上的截距相等的直线方程是__________;2在两坐标轴上截距互为相反数的直线方程
1求经过点11且在x轴上截距等于y轴上截距的直线方程 2求过直线x﹣2y+2=0与2x﹣y﹣2=
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