高中文数问题(求三角形面积、不等式的问题),1.在△ABC中,AB=4√3,AC=2√3,AD为BC边上的中线,且∠BAD=30°,则△ABC的面积是?(答案是6√3)2.若直线ax+by+1=0(a>0,b>0)将圆x²+y²+2x+2y=0恰好
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![高中文数问题(求三角形面积、不等式的问题),1.在△ABC中,AB=4√3,AC=2√3,AD为BC边上的中线,且∠BAD=30°,则△ABC的面积是?(答案是6√3)2.若直线ax+by+1=0(a>0,b>0)将圆x²+y²+2x+2y=0恰好](/uploads/image/z/14220524-20-4.jpg?t=%E9%AB%98%E4%B8%AD%E6%96%87%E6%95%B0%E9%97%AE%E9%A2%98%EF%BC%88%E6%B1%82%E4%B8%89%E8%A7%92%E5%BD%A2%E9%9D%A2%E7%A7%AF%E3%80%81%E4%B8%8D%E7%AD%89%E5%BC%8F%E7%9A%84%E9%97%AE%E9%A2%98%EF%BC%89%2C1.%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3D4%E2%88%9A3%2CAC%3D2%E2%88%9A3%2CAD%E4%B8%BABC%E8%BE%B9%E4%B8%8A%E7%9A%84%E4%B8%AD%E7%BA%BF%2C%E4%B8%94%E2%88%A0BAD%3D30%C2%B0%2C%E5%88%99%E2%96%B3ABC%E7%9A%84%E9%9D%A2%E7%A7%AF%E6%98%AF%3F%EF%BC%88%E7%AD%94%E6%A1%88%E6%98%AF6%E2%88%9A3%EF%BC%892.%E8%8B%A5%E7%9B%B4%E7%BA%BFax%2Bby%2B1%3D0%EF%BC%88a%EF%BC%9E0%2Cb%EF%BC%9E0%EF%BC%89%E5%B0%86%E5%9C%86x%26%23178%3B%2By%26%23178%3B%2B2x%2B2y%3D0%E6%81%B0%E5%A5%BD)
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