circle

Question: The condition that the circle ${{(x-3)}^{2}}+{{(y-4)}^{2}}={{r}^{2}}$ lies entirely within the circle ${{x}^{2}}+{{y}^{2}}={{R}^{2}},$ is

1) $R+r\le 7$

2) ${{R}^{2}}+{{r}^{2}}<49$

3) ${{R}^{2}}-{{r}^{2}}<25$

4) $R-r>5$

Solution:

Explanation: No Explanation

System of circles

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