一、填空题(共70分)1.一个正△ABC内接于椭圆x2/9+y2/4=1,顶点A的坐标为(0,2).过顶点A的高在y轴上,则此正三角形的边长为____.2.已知x、y为正数,且x/y的值为____。3.袋里装有35个球,每个球上都记有从1到35的一个号码,设号码为n的球重(n2/3-5n+23)克,这些球以同等的机会(不受其重量的影响)从袋里取出.若同时从袋内任意取出两球,则它们重量相等的概率为(用分数作答). First, fill in the blank questions (a total of 70 points) 1. A positive △ ABC inscribed in the ellipse x2/9 + y2/4 = 1, the coordinates of the vertex A is (0,2). The height of the A over the y-axis, The side length of this regular triangle is ____.2. Known x and y are positive numbers, and the value of x/y is ____. 3. There are 35 balls in the bag, each ball bearing a number from 1 to 35, with a number n of ball weight (n2/3-5n+23) grams. These balls have equal opportunities ( Not affected by its weight.) Remove from the bag. If two balls are randomly taken from the bag at the same time, their probability of equal weight is (using the score to answer).