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Three family of lines (2x+3y+1) +k1 (2x+...

Three family of lines `(2x+3y+1) +k_1 (2x+4y+4)=0.(3+6tantheta)x + (4+4 tan theta)y +(4+tan theta) =0, (x+y+lambda)+k_3(2x+y+1)=0` The value of `lambda` so that three families have a common member

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