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A circle with center (1, 0) and radius 2 lies in the coordinate plane

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Joined: 02 Sep 2009
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A circle with center (1, 0) and radius 2 lies in the coordinate plane  [#permalink]

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New post 13 Sep 2018, 02:29
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A
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D
E

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  65% (hard)

Question Stats:

60% (02:12) correct 40% (01:52) wrong based on 39 sessions

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A circle with center (1, 0) and radius 2 lies in the coordinate plane  [#permalink]

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New post 13 Sep 2018, 02:39
Ans D

(a,b)= (3,0)

(x,y) lies on the circle.

Q: Is y=b=0?

St.1: x=-1.
Coordinates of only point on circle with x=-1 is (-1,0)
So, y=b=0. Sufficient.

St.2: y=0. We are given that b=0. Hence, y=b=0. Sufficient.
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A circle with center (1, 0) and radius 2 lies in the coordinate plane   [#permalink] 13 Sep 2018, 02:39
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A circle with center (1, 0) and radius 2 lies in the coordinate plane

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