已知x,y∈R,满足x²+y²-4x-6y+12=0 1.y/x的范围,2.x²+y²的范围 3已知x,y∈R,满足x²+y²-4x-6y+12=01.y/x的范围,2.x²+y²的范围 3.x+y的范围
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![已知x,y∈R,满足x²+y²-4x-6y+12=0 1.y/x的范围,2.x²+y²的范围 3已知x,y∈R,满足x²+y²-4x-6y+12=01.y/x的范围,2.x²+y²的范围 3.x+y的范围](/uploads/image/z/6933581-53-1.jpg?t=%E5%B7%B2%E7%9F%A5x%2Cy%E2%88%88R%2C%E6%BB%A1%E8%B6%B3x%26%23178%3B%2By%26%23178%3B-4x-6y%2B12%3D0+1.y%2Fx%E7%9A%84%E8%8C%83%E5%9B%B4%2C2.x%26%23178%3B%2By%26%23178%3B%E7%9A%84%E8%8C%83%E5%9B%B4+3%E5%B7%B2%E7%9F%A5x%2Cy%E2%88%88R%2C%E6%BB%A1%E8%B6%B3x%26%23178%3B%2By%26%23178%3B-4x-6y%2B12%3D01.y%2Fx%E7%9A%84%E8%8C%83%E5%9B%B4%2C2.x%26%23178%3B%2By%26%23178%3B%E7%9A%84%E8%8C%83%E5%9B%B4+3.x%2By%E7%9A%84%E8%8C%83%E5%9B%B4)
已知x,y∈R,满足x²+y²-4x-6y+12=0 1.y/x的范围,2.x²+y²的范围 3已知x,y∈R,满足x²+y²-4x-6y+12=01.y/x的范围,2.x²+y²的范围 3.x+y的范围
已知x,y∈R,满足x²+y²-4x-6y+12=0 1.y/x的范围,2.x²+y²的范围 3
已知x,y∈R,满足x²+y²-4x-6y+12=0
1.y/x的范围,2.x²+y²的范围 3.x+y的范围
已知x,y∈R,满足x²+y²-4x-6y+12=0 1.y/x的范围,2.x²+y²的范围 3已知x,y∈R,满足x²+y²-4x-6y+12=01.y/x的范围,2.x²+y²的范围 3.x+y的范围