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two parallel line L1=3x + y = 5 and L2=3x+y=15. a line is drawn passing through point (4, 3 ) and cuts L1 at A and L2 at B two perpendiculars are drawn at point A and B which cuts the lines L1 and L2 at A` and B` . what sould be the equation of line so that area AA`BB` is minimum. ans is 7x + y -31 =0 pls explain ?

two parallel line L1=3x + y = 5 and L2=3x+y=15. a line is drawn passing through point (4, 3 ) and cuts L1 at A and L2 at B


two perpendiculars are drawn at point A and B which cuts the lines L1 and L2 at A` and B` . what sould be the equation of line so that area AA`BB` is minimum.


ans is 7x + y -31 =0


pls explain ?

Grade:12

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