The lines joining the origin to the poin...

The lines joining the origin to the points of intersection of x+2y=k with the pair of lines `2x^(2)-2xy+3y^(2)+2x-y-1=0` are at right angles then k =

`pm1`

`pm2`

`pm3`

`pm4`

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AAKASH SERIES-PAIR OF STRAIGHT LINES-PRACTICE EXERCISE

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