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If the line $lx+my=1$ is normal to the hyperbola
\[\begin {array} {1 1} (a)\;a^2-b^2 & \quad (b)\;a^2+b^2 \\ (c)\;(a^2+b^2)^2 & \quad (d)\;(a^2-b^2)^2 \end {array}\]
jeemain
eamcet
math
2007
q58
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Oct 26, 2013
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meena.p
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$ (c)\;(a^2+b^2)^2$
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Nov 7, 2013
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pady_1
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