Math doubt conics


57 and 60(the last one)



I think the answer is 2 (B)


I think the answer for 57 is 7(B)


Yes, how? Pls send solutions


For 2(B), eliminate t, u will get eqn of hyperbola, then calculate eccentricity
For 57, use ae=AE , condition for equal focus, u will get value eccentricity of ellipse, use that e to calculate b^2 .


Dear Student,

Below is the required solution.


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