摘要： 已知过椭圆$C$：$\dfrac{\textit{x}^2}{\textit{a}^2}+\dfrac{\textit{y}^2}{\textit{b}^2}=1(\textit{a} \textit{b} 0)$的焦点$F$ 且倾斜角为$45^\circ$的直线交椭圆$C$于$A$、$B$ 两点, 阅读全文