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Geometry Difficulty 4.5 AIME Find the answer

4. The equation of the tangent line passing through the point P(13,223)\mathrm{P}\left(-\frac{1}{3}, \frac{2 \sqrt{2}}{3}\right) on the circle x2+y2=1\mathrm{x}^{2}+\mathrm{y}^{2}=1 is \qquad ,

A number or a short expression. Spacing and $ signs are ignored.

Solution

4.x22y+3=04 . x-2 \sqrt{2} y+3=0

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Source: NuminaMath-1.5, licensed Apache-2.0. Statement and solution reproduced as published; topic and difficulty added by this site.