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Which sum equals 1/((x-1)(x-2))?
A2/(x-2) - 1/(x-1)
B1/(x-1) + 1/(x-2)
C1/(x-1) - 1/(x-2)
D1/(x-2) - 1/(x-1)
Answer & Solution
Correct answer: D. 1/(x-2) - 1/(x-1)
A = 1/(1-2) = -1 and B = 1/(2-1) = 1, so the sum is 1/(x-2) - 1/(x-1).
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