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The graph of x^2/a^2 + y^2/b^2 = 1 has its foci at (0, +/- 4), while the graph of x^2/a^2 - y^2/b^2 =1 has foci at (0, +/- 6). Compute the value |ab|.

 Dec 6, 2019
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|ab| = 12*sqrt(3).

 Dec 6, 2019

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