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标题: 数学求解~~ [打印本页]
作者: serenaxu97 时间: 2018-10-3 11:34
标题: 数学求解~~
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 -110
求问①这题intersect到底理解成相交还是相切呀 而且 ②x-intercept>1 是只有正的吗?
作者: serenaxu97 时间: 2018-10-3 11:38
条件2搞错了!! 是-1/10 负十分之一
作者: MeinSchaetzchen 时间: 2018-10-3 11:58
相交。截距不是距离,有正、负、0
作者: serenaxu97 时间: 2018-10-3 12:25
好的谢谢!
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