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Two parabolas with the same axis, focus ...

Two parabolas with the same axis, focus of cach being exteror to the other and the latusrectum being 4a and 4b. The locuof the middle points of the intercepts between the parabolas made on the lines parabllel to the common axis is a

A

straight line if a = b

B

parabola if `aneb`

C

parabola `AA` all a, b

D

none of these

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The correct Answer is:
A, B
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