200分~好了再加!过椭圆x^2+4y^2=4的右焦点F作直线l交椭圆于M、N两点,设|MN|=3/2(1)求直线l的斜率.这个是我期末考试题。我当时的做法是:x^2+4y^2=4……(1),解得:a=2,b=1,c=√3设i斜率为k,则直
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![200分~好了再加!过椭圆x^2+4y^2=4的右焦点F作直线l交椭圆于M、N两点,设|MN|=3/2(1)求直线l的斜率.这个是我期末考试题。我当时的做法是:x^2+4y^2=4……(1),解得:a=2,b=1,c=√3设i斜率为k,则直](/uploads/image/z/5334876-36-6.jpg?t=200%E5%88%86%7E%E5%A5%BD%E4%BA%86%E5%86%8D%E5%8A%A0%21%E8%BF%87%E6%A4%AD%E5%9C%86x%5E2%2B4y%5E2%3D4%E7%9A%84%E5%8F%B3%E7%84%A6%E7%82%B9F%E4%BD%9C%E7%9B%B4%E7%BA%BFl%E4%BA%A4%E6%A4%AD%E5%9C%86%E4%BA%8EM%E3%80%81N%E4%B8%A4%E7%82%B9%2C%E8%AE%BE%7CMN%7C%3D3%2F2%EF%BC%881%EF%BC%89%E6%B1%82%E7%9B%B4%E7%BA%BFl%E7%9A%84%E6%96%9C%E7%8E%87.%E8%BF%99%E4%B8%AA%E6%98%AF%E6%88%91%E6%9C%9F%E6%9C%AB%E8%80%83%E8%AF%95%E9%A2%98%E3%80%82%E6%88%91%E5%BD%93%E6%97%B6%E7%9A%84%E5%81%9A%E6%B3%95%E6%98%AF%EF%BC%9Ax%5E2%2B4y%5E2%3D4%E2%80%A6%E2%80%A6%281%29%EF%BC%8C%E8%A7%A3%E5%BE%97%EF%BC%9Aa%3D2%EF%BC%8Cb%3D1%EF%BC%8Cc%3D%E2%88%9A3%E8%AE%BEi%E6%96%9C%E7%8E%87%E4%B8%BAk%EF%BC%8C%E5%88%99%E7%9B%B4)
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