题目内容
圆截直线5x-12y+C=0所得的弦长为8,则C的值是_________.
圆
A.10 B.10或-68
C.5或-34 D.-68
.圆x2+y2-2x+4y-20=0截直线5x-12y+c=0所得的弦长为8,则c的值是( )
A.10 B.10或-68 C.5或-34 D.-68
圆x2+y2-2x+4y-20=0截直线5x-12y+c=0所得的弦长为8,则c的值是( )
A.10 B.10或-68
C.5或-34 D.-68