共50条信息
“\(k < 0 \)”是“方程\( \dfrac{{x}^{2}}{1-k}+ \dfrac{{y}^{2}}{k}=1 \)表示双曲线”的\((\) \()\)
已知双曲线过点\(\left(3,-2\right) \)且与椭圆\(4{{x}^{2}}+9{{y}^{2}}=36\)有相同的焦点.
\((1)\) 求双曲线的标准方程;
\((2)\) 若点\(M\)在双曲线上,\({F}_{1},{F}_{2} \)为左右焦点,且\(\left| M{{F}_{1}} \right|+\left| M{{F}_{2}} \right|=6\sqrt{3}\),试判断\(\Delta M{{F}_{1}}{{F}_{2}}\)的形状.
双曲线\(\dfrac{{{x}^{2}}}{4}-\dfrac{{{y}^{2}}}{5}=1\)的焦点坐标为
若双曲线\(\dfrac{x^{2}}{a^{2}}{-}\dfrac{y^{2}}{b^{2}}{=}1(a{,}b{ > }0)\)渐近线方程为\(y{=±}\dfrac{\sqrt{3}}{3}x\),则其离心率为\((\) \()\).
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