摘要:
已知椭圆$\dfrac{{{x^2}}}{{{a^2}}} + \dfrac{{{y^2}}}{{{b^2}}} = 1$($a > b > 0$),${F_1}$、${F_2}$为其左右焦点,$P$为椭圆$C$上任意一点,$I$为$\triangle P{F_1}{F_2}$内切圆圆心,点$G$满足$\overrightarrow {P{F_1}}+ \overrightarrow {P{F_2}}= 3\overrightarrow {PG} $且$\overrightarrow {GI}= \lambda \overrightarrow {{F_1}{F_2}} $($\lambda\in {\mathbb {R}}$且$\lambda\ne 0$),则椭圆的离心率是___ 阅读全文