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The equation ${lx}^{2} + 2 mxy + {ny}^{2} = 0$ represents a pair lines then the relation between $l, m$ is

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nm≥ml

ml≥nm

ml>nm

nm>ml

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detailed solution

Correct option is B

The condition that the equation ax2+2hxy+by2=0 to represents a pair of lines passing through the origin is h2≥abHence, m2≥lnIt implies that ml≥nm

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The equation lx2+2mxy+ny2=0 represents a pair lines then the relation between l,m is

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The equation ${lx}^{2} + 2 mxy + {ny}^{2} = 0$ represents a pair lines then the relation between $l, m$ is