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,已知圆\(O:{{x}^{2}}+{{y}^{2}}=4\),直线\(l:y=x-3\),\(P\)为\(l\)上一点\(.\)若以点\(P\)为圆心,\(1\)为半径的圆与圆\(O\)有公共点,则点\(P\)的横坐标的取值范围为 .
已知\(A(1,0)\),\(B(4,0)\),\(C(3,4)\),\(O\)为坐标原点,且\(\overrightarrow{OD} =\dfrac{1}{2} (\overrightarrow{OA} +\overrightarrow{OB} -\overrightarrow{CB} )\),则\(|\overrightarrow{BD} |=\)________.
进入组卷