已知实数x,y满足x²+y²-6x-4y+12=0 求x-y的最大值与最小值.已知实数x,y满足x²+y²-6x-4y+12=0求x-y的最大值与最小值.最好有图,
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![已知实数x,y满足x²+y²-6x-4y+12=0 求x-y的最大值与最小值.已知实数x,y满足x²+y²-6x-4y+12=0求x-y的最大值与最小值.最好有图,](/uploads/image/z/3914404-52-4.jpg?t=%E5%B7%B2%E7%9F%A5%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3x%26%23178%3B%2By%26%23178%3B-6x-4y%2B12%3D0+%E6%B1%82x-y%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%8E%E6%9C%80%E5%B0%8F%E5%80%BC.%E5%B7%B2%E7%9F%A5%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3x%26%23178%3B%2By%26%23178%3B-6x-4y%2B12%3D0%E6%B1%82x-y%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%8E%E6%9C%80%E5%B0%8F%E5%80%BC.%E6%9C%80%E5%A5%BD%E6%9C%89%E5%9B%BE%2C)
已知实数x,y满足x²+y²-6x-4y+12=0 求x-y的最大值与最小值.已知实数x,y满足x²+y²-6x-4y+12=0求x-y的最大值与最小值.最好有图,
已知实数x,y满足x²+y²-6x-4y+12=0 求x-y的最大值与最小值.
已知实数x,y满足x²+y²-6x-4y+12=0
求x-y的最大值与最小值.
最好有图,
已知实数x,y满足x²+y²-6x-4y+12=0 求x-y的最大值与最小值.已知实数x,y满足x²+y²-6x-4y+12=0求x-y的最大值与最小值.最好有图,
x²+y²-6x-4y+12=0
(x-3)²+(y-2)²=1
x=3+cost
y=2+sint
x-y
=3+cost-2-sint
=cost-sint+1
=√2sin(pai/4-t)+1
最大值√2+1
最小值-√2+1
后面的数字是13吧?