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The curves \( a x^{2}+b y^{2}=1 \) and \( A x^{2}+B y^{2}=1 \)
P
W intersect orthogonally, then:
(1) \( \frac{1}{a}+\frac{1}{A}=\frac{1}{b}+\frac{1}{B} \)
(2) \( \frac{1}{a}-\frac{1}{A}=\frac{1}{b}-\frac{1}{B} \)
(3) \( \frac{1}{a}+\frac{1}{b}=\frac{1}{B}-\frac{1}{A} \)
(4) \( \frac{1}{a}+\frac{1}{b}=\frac{1}{A}+\frac{1}{B} \)
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