已知直线l:y=k(x+2根号下2)与圆O:x2+y2=4相交于A B两点,O是坐标原点,三角形ABC的面积为S,1:将S表示为k的涵数,并写出定义域 2:求S的最大值,并求出S最大时的k植
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![已知直线l:y=k(x+2根号下2)与圆O:x2+y2=4相交于A B两点,O是坐标原点,三角形ABC的面积为S,1:将S表示为k的涵数,并写出定义域 2:求S的最大值,并求出S最大时的k植](/uploads/image/z/3819388-4-8.jpg?t=%E5%B7%B2%E7%9F%A5%E7%9B%B4%E7%BA%BFl%3Ay%3Dk%28x%2B2%E6%A0%B9%E5%8F%B7%E4%B8%8B2%29%E4%B8%8E%E5%9C%86O%3Ax2%2By2%3D4%E7%9B%B8%E4%BA%A4%E4%BA%8EA+B%E4%B8%A4%E7%82%B9%2CO%E6%98%AF%E5%9D%90%E6%A0%87%E5%8E%9F%E7%82%B9%2C%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E9%9D%A2%E7%A7%AF%E4%B8%BAS%2C1%EF%BC%9A%E5%B0%86S%E8%A1%A8%E7%A4%BA%E4%B8%BAk%E7%9A%84%E6%B6%B5%E6%95%B0%2C%E5%B9%B6%E5%86%99%E5%87%BA%E5%AE%9A%E4%B9%89%E5%9F%9F+2%3A%E6%B1%82S%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%2C%E5%B9%B6%E6%B1%82%E5%87%BAS%E6%9C%80%E5%A4%A7%E6%97%B6%E7%9A%84k%E6%A4%8D)
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