43. 3416-!-item-!-187;#058&003281 Circle C and line k lie in the xy-plane. If circle C is centered at the origin and has radius 1, does line k intersect circle C ?
(1) The x-intercept of line k is greater than 1.
(2) The slope of line k is - 1/10 答案为e (1)+(2)我算的时候觉得是充分的 设了方程,y=-0.1x+b 由条件(1) b>1 因此 该直线与x轴交点为(10b,0) 10b>10 因此可以确定不相交吧? 求指教 困惑中。。。。。