2021届高考数学总复习:椭圆及其性质2课课前前自自主主回回3常数焦点焦距4椭圆线段空集56坐标轴原点F1(c,0)F2(c,0)F1(0,c)F2(0,c)7ba8910111213141516171819课课堂堂考考点点探探2021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566课课后后限限时时集集训训点击右图进入点击右图进入67Thank you for watching!