设椭圆方程为x^2/a^2+y^2/b^2=1或y^2/a^2+x^2/b^2=1(a＞b＞0)依题意得{2c+a=10{e=c/a=1/3{a^2=b^2+c^2解得：a=6,c=2,b=4√2∴椭圆的方程为x^2/36+y^2/32=1或y^2/36+x^2/32=1...