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For a nonzero constant a, 1/(x^2-a^2) has coefficient of 1/(x-a) equal to
A1/(2a)
Ba
C1/a
D-1/(2a)
Answer & Solution
Correct answer: A. 1/(2a)
At x = a the other factor x+a equals 2a, so the coefficient is 1/(2a).
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