If the curves \( 2 x^{2}+3 y^{2}=6 \) and \( a x^{2}+4 y^{2}=4 \)
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If the curves \( 2 x^{2}+3 y^{2}=6 \) and \( a x^{2}+4 y^{2}=4 \)
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W. intersect orthogonally, then \( a= \)
(1) 2
(2) 1
(3) 3
(4) None of these
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