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Length of the semi-transverse axis of the rectangular hyperbola $xy=8$ is

\[\begin{array}{1 1 }(1)2&(2)4\\(3)16&(4)8\end{array}\]

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The equation of the rectangle hyperbola is $xy=8$
$\therefore c^2=8 => \large\frac{a^2}{2}$$=8$
$a^2=16=>a=4$
Length of semi transverse axis $a=4$
Hence 2 is the correct answer.
answered May 16, 2014 by meena.p
 
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