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#8f02e990-4af1-47c9-beff-555b5c94f4f6简单填空题双曲线直线与圆+圆锥曲线

32. 已知双曲线C:x2a2y2b2=1(a>0,b>0)C:\frac{x^2}{a^2}-\frac{y^2}{b^2}=1(a>0,b>0)的左、右焦点分别为F1F_{1}F2F_{2},点MMCC上,且MF1MF2MF_{1}\bot MF_{2}ΔOMF1\Delta OMF_{1}的面积为a218(O\frac{a^2}{18}(O为坐标原点),则双曲线CC的离心率为((  ))