EllipseHard

Question

The foci of the ellipse = 1 and the hyperbola coincide. Then the value of b2 is

Options

A.1
B.5
C.7
D.9

Solution


⇒ e1 =
ae2 = × 4 = 3
⇒   b2 = 7.
Hence, (C) is the correct answer.

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