AP EAPCET 20-Aug-2021 Shift 1 Paper

Section: Mathematics
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Question : 48 of 160
 
Marks: +1, -0
If the lines, joining the origin to the points of intersection of the curve 2x2−2xy+3y2+2x− y−1=0 and the line x+2y=k, are at right angles, then k2 equals ______
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