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Integrate the rational functions.
Let
⇒ 3x -1 = A(x + 2) + B
Equating the coefficients of x and constant term, we get,
A = 3
2A + B = -1
B = -7
Thus,
[Hint: multiply numerator and denominator by xn-1 and put xn=t]
[Hint: Put ex = t]