共50条信息
已知直线\(l_{1}\):\({ax}{+}2y{+}6{=}0\)和直线\(l_{2}\):\(x+(a-1)y+a^{2}-1=0\)
已知直线\({{l}_{1}}:2x+\left( m+1 \right)y+4=0\)与直线\({{l}_{2}}:mx+3y-6=0\).
\((I)\)当\({{l}_{1}}\)\(/\!/\)\({{l}_{2}}\)时,求实数\(m\)的值;
\((II)\)当\({{l}_{1}}\)\(⊥\)\({{l}_{2}}\)时,求实数\(m\)的值.
直线\({{l}_{1}}\)的方程为\(3x+2y-2=0\),直线\({{l}_{2}}\)的方程为\((2m-1)x+my+1=0\),若\({{l}_{1}}/\!/{{l}_{2}}\)则实数\(m\)的值为 .
将一张坐标纸折叠一次,使点\(\left( 10,0 \right)\)与点\(\left( -6,8 \right)\)重合,则与点\(\left( -4,2 \right)\)重合的点的坐标是\((\) \()\)
已知直线\({{l}_{1}}:x+ay+6=0\)和\({{l}_{2}}:(a-2)x+3y+2a=0\),若\({{l}_{1}}/\!/{{l}_{2}}\),则\(a=\) \(\_.\)
设曲线\(y= \dfrac{1+\cos x}{\sin x}\)在点\(( \dfrac{π}{2},1)\)处的切线与直线\(x-ay+1=0\)平行,则实数\(a\)等于( )
下列直线中与直线\( \sqrt{3} x-y-1=0\)平行的是( )
若直线\(l_{1}\):\(2x-ay-1=0\)过点\((1,1)\),\(l\):\(x+2y=0\),则直线\(l_{1}\)与\(l\)
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