WBJEE 2022 Math Solved Paper

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Question : 8 of 75

Marks: +1, -0

AB is a variable chord of the ellipse ‌

x2

a2

+‌

y2

b2

=1. If AB subtends a right angle at the origin O, then ‌

1

O2

+‌

1

O2

equals to

‌
1
a2
+‌
1
b2
‌
1
a2
−‌
1
b2
a2+b2
a2−b2

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