优优班--学霸训练营 > 知识点挑题
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            • 1.

              已知直线\(l\)的方程为\(2x-y+1=0\)

              \((1)\)求过点\(A(3,2)\),且与\(l\)垂直的直线的方程;

              \((2)\)求与\(l\)平行,且与直线\(l\)的距离为\(\sqrt{5}\)的直线的方程.

            • 2.

              已知曲线\(y= \dfrac{4}{x} \)在点\(P(1,4)\)处的切线与直线\(l\)平行且距离为\( \sqrt{17} \),则直线\(l\)的方程为\((\)  \()\)

              A.\(4x-y+9=0\)                
              B.\(4x-y+9=0\)或\(4x-y+25=0\)

              C.\(4x+y+9=0\)或\(4x+y-25=0\)    
              D.以上均不对
            • 3.

              已知直线\(l_{1}:2x+y-1=0\)与\(l_{2}:2x+y+1=0\)平行,那么直线\(l_{1}\),\(l_{2}\)间的距离\(d=\)____\(.\) 

            • 4. 若两平行直线\(l_{1}\):\(x{-}2y{+}m{=}0(m{ > }0)\)与\(l_{2}\):\(2x{+}ny{-}6{=}0\)之间的距离是\(\sqrt{5}\),则\(m{+}n{=}({  })\)
              A.\(0\)                                         
              B.\(1\)                                          
              C.\({-}2\)
              D.\({-}1\)
            • 5.

              若直线\(l\):\(x+ay+6=0\)与\(l_{2}\):\((a-2)x+3y+2a=0\)平行,则\(l_{1}\)与\(l_{2}\)之间的距离为\((\)  \()\)

              A.\( \dfrac{4 \sqrt{2}}{3}\)              
              B.\(4 \sqrt{2}\)

              C.\( \dfrac{8 \sqrt{2}}{3}\)                               
              D.\(2 \sqrt{2}\)
            • 6.

              已知平行直线\(l_{1}:2x+y-1=0\),\(l_{2}:2x+y+1=0\),则\(l_{1}\)与\(l_{2}\)的距离是____\(.\) 

            • 7.

              若平面区域\(\begin{cases} x{+}y\mathrm{{-}}3{\geqslant }0\mathrm{{,}} \\ 2x\mathrm{{-}}y\mathrm{{-}}3{\leqslant }0\mathrm{{,}} \\ x\mathrm{{-}}2y{+}3{\geqslant }0 \end{cases}\)夹在两条斜率为\(1\)的平行直线之间,则这两条平行直线间的距离的最小值是____\(.\) 

            • 8.

              两平行线分别经过点\(A(3,0)\),\(B(0,4)\),它们之间的距离\(d\)满足的条件是(    )

              A.\(0 < d\leqslant 3\)
              B.\(0 < d\leqslant 5\)
              C.\(0 < d < 4\)
              D.\(3\leqslant d\leqslant 5\)
            • 9.

              已知直线 \(l\)\({\,\!}_{1}\): \(x\)\(+\) \(y\)\(+1=0\), \(l\)\({\,\!}_{2}\): \(x\)\(+\) \(y\)\(-1=0\),则 \(l\)\({\,\!}_{1}\), \(l\)\({\,\!}_{2}\)之间的距离为(    )
              A.\(1\)                                  
              B.\( \sqrt{2}\)
              C.\( \sqrt{3}\)                             
              D.\(2\)
            • 10.

              已知平行直线\(l\)\({\,\!}_{1}:2\)\(x+y-\)\(1\)\(=\)\(0\),\(l\)\({\,\!}_{2}:2\)\(x+y+\)\(1\)\(=\)\(0\),则\(l\)\({\,\!}_{1}\)与\(l\)\({\,\!}_{2}\)之间的距离是               

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