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ZX-160EEC5CB4Bluebook试题1 · 第 9 题
Bluebook试题1 · 原库模块 3 · Q9 原库参考解析
Circle A in the xy-plane has the equation (x ＋5)2+(y -5)2= 4.Circle B has the same center as circle A. The radius of circle B is two times the radius of circle A.The equation defining circle B in the xy-plane is (x＋5)2+(y- 5)2= k, where k is a constant. What is the value of k?
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