1.

The pair of lines lx^(2) + 2(l + m) xy + my^(2) = 0 lies along two diameters of a circle and divides the circle into 4 sectors. If the area of bigger sector is 5 times the area of smaller sector, then (l m)/((l+m)^(2)) =

Answer»

`(1)/(2)`
`(2)/(sqrt(3))`
`(11)/(12)`
`(13)/(12)`

Answer :C


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