判定下列直线是否平行, 是否垂直?[tex=7.071x3.929]BxHmN/2SNzvKB/c4Fmh6Vj930uQqjQ8DCX0f9q0Iyt7vNE28fsiOc8koqaCO5QK4VDmAoQvBvxrxKidG/ELQxUvtBtNim2QsZW03y4+q7Sg=[/tex]和[tex=9.429x2.786]u6kj1qzdc6j5LZ2ETcZ/qij3Mxd30UNftInVpwkTpfwPEhGfCqPtvQ0mDkjEv/4hNjwy6SIN37S/r/BfYnMlyeOHp0L43Dp9bFLJmhTJ6RY=[/tex].
判定下列直线是否平行, 是否垂直?[tex=7.071x3.929]BxHmN/2SNzvKB/c4Fmh6Vj930uQqjQ8DCX0f9q0Iyt7vNE28fsiOc8koqaCO5QK4VDmAoQvBvxrxKidG/ELQxUvtBtNim2QsZW03y4+q7Sg=[/tex]和[tex=9.429x2.786]u6kj1qzdc6j5LZ2ETcZ/qij3Mxd30UNftInVpwkTpfwPEhGfCqPtvQ0mDkjEv/4hNjwy6SIN37S/r/BfYnMlyeOHp0L43Dp9bFLJmhTJ6RY=[/tex].
1