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Find the value of p, so that the lines (...


Find the value of `p`, so that the lines `(1-x)/(3) = (7y -14)/(2p) = (z-3)/(2) and (7-7x)/(3p) = (y-5)/(1) = (6-z)/(5)` are at right angle.

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The correct Answer is:
`p = (70)/(11)`
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Show that the line (5-x)/(-4) = (y-7)/( 4) = (z+3)/(-5) and (x-8)/( 7) = (2y-8)/( 2) = (z-5)/(3) are coplanar.

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