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受欢迎的 Geometry >

100x^2+100y^2-100x+400y+409=0

解答

100 x^{2} + 100 y^{2} - 100 x + 400 y + 409 = 0

解答

(a, b) = (\frac{1}{2}, - 2), r = \frac{2}{5}

求解步骤

100 x^{2} + 100 y^{2} - 100 x + 400 y + 409 = 0

将

100 x^{2} + 100 y^{2} - 100 x + 400 y + 409 = 0

改写为圆标准方程

(x - \frac{1}{2})^{2} + (y - (- 2))^{2} = (\frac{2}{5})^{2}

因此圆的性质是:

(a, b) = (\frac{1}{2}, - 2), r = \frac{2}{5}

作图

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