共50条信息
已知点\(M(x,y)\)的坐标满足条件\(\begin{cases} & x-1\leqslant 0, \\ & x+y-1\geqslant 0, \\ & x-y+1\geqslant 0. \end{cases}\) 设\(O\)为原点,则\(\left| \,OM\, \right|\)的最小值是____.
在平面直角坐标系\(xOy\)中,已知点\(A(1,1)\),\(B(3,-1)\),则\(\triangle AOB\)的面积是____.
圆\(C\):\({{x}^{2}}+{{y}^{2}}+2x-2y-2=0\)的圆心到直线\(3x+4y+14=0\)的距离是\(\_\).
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