求这几道高二数学题解法,要过程!1,三角形ABC,|BC|=6,sinB+sinC=3/2sinA,求点A轨迹方程.2,圆A:(x+2)平方+Y平方=16,圆B:(X-2)平方+Y平方=4动圆C与圆A内切,与圆B外切,求动圆圆心C的轨迹方程.3,设椭圆x^
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![求这几道高二数学题解法,要过程!1,三角形ABC,|BC|=6,sinB+sinC=3/2sinA,求点A轨迹方程.2,圆A:(x+2)平方+Y平方=16,圆B:(X-2)平方+Y平方=4动圆C与圆A内切,与圆B外切,求动圆圆心C的轨迹方程.3,设椭圆x^](/uploads/image/z/15227071-7-1.jpg?t=%E6%B1%82%E8%BF%99%E5%87%A0%E9%81%93%E9%AB%98%E4%BA%8C%E6%95%B0%E5%AD%A6%E9%A2%98%E8%A7%A3%E6%B3%95%2C%E8%A6%81%E8%BF%87%E7%A8%8B%211%2C%E4%B8%89%E8%A7%92%E5%BD%A2ABC%2C%7CBC%7C%3D6%2CsinB%2BsinC%3D3%2F2sinA%2C%E6%B1%82%E7%82%B9A%E8%BD%A8%E8%BF%B9%E6%96%B9%E7%A8%8B.2%2C%E5%9C%86A%EF%BC%9A%28x%2B2%29%E5%B9%B3%E6%96%B9%2BY%E5%B9%B3%E6%96%B9%3D16%2C%E5%9C%86B%EF%BC%9A%EF%BC%88X-2%EF%BC%89%E5%B9%B3%E6%96%B9%2BY%E5%B9%B3%E6%96%B9%EF%BC%9D4%E5%8A%A8%E5%9C%86C%E4%B8%8E%E5%9C%86A%E5%86%85%E5%88%87%2C%E4%B8%8E%E5%9C%86B%E5%A4%96%E5%88%87%2C%E6%B1%82%E5%8A%A8%E5%9C%86%E5%9C%86%E5%BF%83C%E7%9A%84%E8%BD%A8%E8%BF%B9%E6%96%B9%E7%A8%8B.3%2C%E8%AE%BE%E6%A4%AD%E5%9C%86x%5E)
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