点p(x,y)是椭圆x²/a²+y²/b²=1(a>b>0)上一点,求xy的范围

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点p(x,y)是椭圆x²/a²+y²/b²=1(a>b>0)上一点,求xy的范围点p(x,y)是椭圆x²/a²+y²/b²

点p(x,y)是椭圆x²/a²+y²/b²=1(a>b>0)上一点,求xy的范围
点p(x,y)是椭圆x²/a²+y²/b²=1(a>b>0)上一点,求xy的范围

点p(x,y)是椭圆x²/a²+y²/b²=1(a>b>0)上一点,求xy的范围
[-a*b/2 ,a*b/2]