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vrajesh.dave
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Circle C and line K lie in the xy-plane. If circle C is

by vrajesh.dave Thu Oct 15, 2009 12:47 am

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 the line K is greater than 1.

(2) The slope of line K is -(1/10)


OA: E

Statement 1: insufficient. Since we do not know the slope of the line we cannot really tell if the line is a tangent or if it intersects the circle.

Statement 2: Insufficient. Since we do not know the points of intersection with x or y axis.

Both: We know the slope and point of intersection.

Hence can tell if the line is intersecting the circle or not. Am i missing something there. Since we need to know atleast two things about a line -- points, slope or equation. We know the slope, and the x intercept.
papa.baffour
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Re: Circle C and line K lie in the xy-plane. If circle C is

by papa.baffour Thu Oct 15, 2009 4:44 pm

Is this a question or are you answering it?

Statement 2 doesn't give you a the X intercept-- it only tells you that the x intercept is greater than 1. It could be any number greater than 1.
anoo.anand
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Re: Circle C and line K lie in the xy-plane. If circle C is

by anoo.anand Tue Oct 20, 2009 11:59 am

Answer is E.

You can have multiple which could intersect circle or may not.

sinc x intercept is > 1 means u can draws infinite lines .
RonPurewal
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Re: Circle C and line K lie in the xy-plane. If circle C is

by RonPurewal Sat Oct 24, 2009 8:15 am