首页
经过点M(2,-1)作圆x2+y2=5的切线,则切线的方程为A.x+y=5B.x+y+5=...
试题详情
经过点M(2,-1)作圆x
2+y
2=5的切线,则切线的方程为( )
A.
x+y=5
B.
x+y+5=0
C.2x-y-5=0
D.2x+y+5=0
相关试题
-
经过点M(2,-1)作圆x2+y2=5的切线,则切线的方程为( )
A.x+y=5
B.x+y+5=0
C.2x-y-5=0
D.2x+y+5=0
-
与直线2x-y+5=0平行的抛物线y=x2的切线方程为( )
A.2x-y-1=0
B.2x-y-3=0
C.2x-y+1=0
D.2x-y+3=0
-
与直线2x-y+4=0的平行的抛物线y=x2的切线方程是( )
A.2x-y+3=0
B.2x-y-3=0
C.2x-y+1=0
D.2x-y-1=0
-
与直线2x-y+4=0的平行的抛物线y=x2的切线方程是( )
A.2x-y+3=0
B.2x-y-3=0
C.2x-y+1=0
D.2x-y-1=0
-
若PQ是圆x2+y2=9的弦,PQ的中点是(1,2),则直线PQ的方程是( )
A.x+2y-3=0
B.x+2y-5=0
C.2x-y+4=0
D.2x-y=0
-
若PQ是圆x2+y2=9的弦,PQ的中点是(1,2),则直线PQ的方程是( )
A.x+2y-3=0
B.x+2y-5=0
C.2x-y+4=0
D.2x-y=0
-
若PQ是圆x2+y2=9的弦,PQ的中点是(1,2),则直线PQ的方程是( )
A.x+2y-3=0
B.x+2y-5=0
C.2x-y+4=0
D.2x-y=0
-
圆:x2+y2-4x+6y=0和圆:x2+y2-6y=0交于A,B两点,则AB的垂直平分线的方程是( )
A.x+y+3=0
B.2x-y-5=0
C.3x+y-3=0
D.4x-3y+7=0
-
圆:x2+y2-4x+6y=0和圆:x2+y2-6y=0交于A,B两点,则AB的垂直平分线的方程是( )
A.x+y+3=0
B.2x-y-5=0
C.3x+y-3=0
D.4x-3y+7=0
-
圆:x2+y2-4x+6y=0和圆:x2+y2-6y=0交于A,B两点,则AB的垂直平分线的方程是( )
A.x+y+3=0
B.2x-y-5=0
C.3x+y-3=0
D.4x-3y+7=0