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14-02-2024
Mathematics

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if the curves, x²/a + y²/b = 1 and x²/c + y²/d = 1, intersect each other at an angle of 900, then which of the following relations is true?
a. a+b = c+d
b. a-b = c-d
c. ab = (c+d)/(a+b)
d. a-c = b+d

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