Integrate the rational functions.
Let 
1 = A(X2 + 1) + (Bx + C)
Equating the coefficients of x2, x and constant term, we get,
A + B = 0
C = 0
A = 1
On solving these equations, we get,
A = 1, B = -1 and C = 0
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Integrate the rational functions.
Let
1 = A(X2 + 1) + (Bx + C)
Equating the coefficients of x2, x and constant term, we get,
A + B = 0
C = 0
A = 1
On solving these equations, we get,
A = 1, B = -1 and C = 0