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ZX-D691DBA8752024年10月A卷 · 第 18 题
2024年10月A卷 · 原库模块 1 · Q18 原库参考解析
Circle A in the xy-plane has the equation \( \left(x+3\right)^2+\left(y-3\right)^2=16 \). 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 \( \left(x+3\right)^2+\left(y-3\right)^2=k \) , where k is a constant. What is the value of k?
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