共50条信息
若直线\({{l}_{1}}:x-2y+1=0,{{l}_{2}}:2x+ay-2=0\)平行,则\({l}_{1} \)与\({l}_{2} \)的距离为__________
在直角坐标系\(xOy\)中,曲线\(C_{1}\)的参数方程为\(\begin{cases}x= \sqrt{3}\cos α \\ y=\sin α\end{cases}(α为参数) \),以坐标原点为极点,以\(x\)轴的正半轴为极轴建立极坐标系,曲线\(C_{2}\)的极坐标方程为\(ρ\sin (θ+ \dfrac{π}{4})=2 \sqrt{2} .\)设点\(P\)在\(C_{1}\)上,点\(Q\)在\(C_{2}\)上,则\(|PQ|\)的最小值是_______
过\(A(4,-3),B(2,-1)\)作直线\(4x+3y-2=0\)的垂线\({{l}_{1}},{{l}_{2}}\),则直线\({{l}_{1}},{{l}_{2}}\)间的距离为__________.
已知直线\(3x+4y-3=0\)与\(6x+my+14=0\)平行,则它们之间的距离是.
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