Mathematics · 2019
JEE Main · 10 January 2019, Shift 1 · Q80
If a circle C passing through the point (4,0) touches the circle x^2+y^2+4 x-6 y=12 externally at the point (1, -1), then the radius of C is:
If a circle C passing through the point $\displaystyle (4,0)$ touches the circle $\displaystyle x^2+y^2+4 x-6 y=12$ externally at the point $\displaystyle (1, -1)$, then the radius of $\displaystyle C$ is :
Official answer
(4)
$\displaystyle 5$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.