若实数x 、y满足根号下5x-1+绝对值的y+5然后等于0,则根号下xy =
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若实数x 、y满足根号下5x-1+绝对值的y+5然后等于0,则根号下xy =
![若实数x 、y满足根号下5x-1+绝对值的y+5然后等于0,则根号下xy =](/uploads/image/z/6095938-58-8.jpg?t=%E8%8B%A5%E5%AE%9E%E6%95%B0x+%E3%80%81y%E6%BB%A1%E8%B6%B3%E6%A0%B9%E5%8F%B7%E4%B8%8B5x-1%2B%E7%BB%9D%E5%AF%B9%E5%80%BC%E7%9A%84y%2B5%E7%84%B6%E5%90%8E%E7%AD%89%E4%BA%8E0%2C%E5%88%99%E6%A0%B9%E5%8F%B7%E4%B8%8Bxy+%3D)
因为根号下5x-1和绝对值的y+5都>=0
所以根号下5x-1=0且绝对值的y+5=0
所以x=1/5,y=-5
xy = -1
所以根号下5x-1=0且绝对值的y+5=0
所以x=1/5,y=-5
xy = -1
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