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Old 07-28-2012, 10:11 AM
ESRogs ESRogs is offline
Join Date: Jul 2012
Posts: 12
Default Concentric circles in Q10

The inequality a^2 <= x1^2 + x2^2 <= b^2 in question 10 implies

1) that the points have to be outside of the smaller circle and inside the larger circle, and
2) that the circles have to be centered at the origin.

Is that correct?
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