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# The distance between the two lines represents by $8x^2-24 xy +18 y^2-6x+9y-5=0$

$\begin {array} {1 1} (1)\;0 & \quad (2)\;\frac{3}{4 \sqrt {13}} \\ (3)\;\frac{6}{\sqrt {13}} & \quad (4)\;\frac{7}{2 \sqrt 13} \end {array}$

$(4)\;\frac{7}{2 \sqrt 13}$

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