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In the rectangular coordinate system, points (4, 0) and ( 4,

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In the rectangular coordinate system, points (4, 0) and ( 4, [#permalink] New post 06 Nov 2008, 09:39
In the rectangular coordinate system, points (4, 0) and (– 4, 0) both lie on circle C. What is the maximum possible value of the radius of C ?

A. 2
B. 4
C. 8
D. 16
E. There is no finite maximum value.
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Re: coordinate system-30 [#permalink] New post 06 Nov 2008, 11:33
E

the line segment joining the 2 points can can be a chord of any length for the circle
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Re: coordinate system-30 [#permalink] New post 07 Nov 2008, 04:24
yep, E. The trick is "maximum radius" and not "minimum radius".
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Re: coordinate system-30 [#permalink] New post 07 Nov 2008, 04:27
E it is.

If the question read minimum radius, then the answer would have been 4.
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Re: coordinate system-30   [#permalink] 07 Nov 2008, 04:27
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In the rectangular coordinate system, points (4, 0) and ( 4,

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