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[" 5.If from the point "P(4,4)" perpendi...

[" 5.If from the point "P(4,4)" perpendiculars to the straight lines "3x+4y+5=0" and "y=mx+7],[" meet the lines at "Q" and "R" and area of triangle "PQR" is maximum then "m" is equal to "],[[" A) "(4)/(3)," B) "-(3)/(4)," C) "-1," D)."," D)."]]

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