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Splitting 1/(x²(x+1)) into A/x, B/x² and C/(x+1) terms, A must be
A-1
B2
C0
D1
Answer & Solution
Correct answer: A. -1
B = 1 and C = 1 from x = 0 and x = -1, and equating x² coefficients gives A + C = 0, so A = -1.
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