In the rectangular coordinate system, the center of a circle is the origin and the radius is r. The center of the other circle is (1,1) with a radius of R. Is the distance between the centers of two circles r + R?
1:$$r^{2}$$+$$R^{2}$$-=2(1-rR)
2:$$R^{2}$$-$$r^{2}$$=2r
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AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
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BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
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CBoth statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.
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DEACH statement ALONE is sufficient.
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EStatements (1) and (2) TOGETHER are NOT sufficient.
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正确答案: A