If \( e \) is the eccentricity of the ellipse whose pair of a \( \m...

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If \( e \) is the eccentricity of the ellipse whose pair of a
\( \mathrm{P}^{19: 2} \) conjugate diameter are \( y=x \) and \( 3 y=-2 x \) is

W
(1) \( 2 / 3 \)
(2) \( 1 / 3 \)
(3) \( 1 / \sqrt{3} \)
(4) None of these
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