共50条信息
若过点\(A(4{,}\sin\alpha)\)和\(B(5{,}\cos\alpha)\)的直线与直线\(x{-}y{+}c{=}0\)平行,则\({|}{AB}{|}\)的值为\(({ })\)
若\({l}_{1}:x+\left(m+1\right)y+\left(m-2\right)=0,{l}_{2}:mx+2y+8=0 \)的图像是两条平行直线,则\(m\)的值是\((\) \()\)
设集合\(A=\{(x,y)|\dfrac{y-3}{x-1}=2,x,y\in \mathbf{R}\}\),\(B=\{(x,y)|4x+ay-16=0\),\(x\),\(y∈R\}\),若\(A∩B=Φ\),则\(a\)的值为\((\) \()\)
“\(m=-1\)”是“直线\(mx+y+1=0\)与直线\(x+my+2=0\)相互平行”的 \((\) \()\)
已知直线\(l_{1}\):\((m+1)x+2y+2m-2=0\),\(l_{2}\):\(2x+(m-2)y+2=0\),若\(l_{1}/\!/l_{2}\),则\(m=\)
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