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Show the condition that the curves a x^2...

Show the condition that the curves `a x^2+b y^2=1` and `Ax^2+By^2=1` should intersect orthogonally is `1/a-1/b=1/A-1/Bdot`

A

`1/a+1/A=1/b+1/B`

B

`1/a-1/A=1/b-1/B`

C

`1/a+1/b=1/B-1/A`

D

None of these

Text Solution

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The correct Answer is:
B
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