1.已知椭圆(x~2)/(a~2)+(y~2)/(b~2)=l(a>b>0),直线x=(a~2)/c(c是椭圆焦距的一半)交x轴于点A,椭圆的上顶点为B,过椭圆的右焦点F作垂直于x轴的直线,交楠圆在第一象限的部分于点P,交AB于点D,点D满足2OD→=OF→+OP→(O为坐标原点).(Ⅰ)求椭圆的离心率.(Ⅱ)若半焦距为3,过点A的直线l交椭圆于 1. It is known that the straight line x = (a ~ 2) / c (c) is elliptic (x ~ 2) / (a ​​~ 2) + (y ~ 2) / (b ~ 2) = l Is the half of the elliptical focal length) cross the x-axis at point A, the upper vertex of the ellipse is B, and the right focus of the oval, F, is a line perpendicular to the x-axis, intersecting the portion of the first quadrant at point P, Point D, point D satisfy 2OD → = OF → + OP → (O is the coordinate origin) (I) Find the elliptic eccentricity. (Ⅱ) If the semi-focal length is 3,