2 (i)], we write
1
(
1) (
2)
x
x
+
+
 =
A
B
1
2
x
x
+
+
+ (1)
where, real numbers A and B are to be determined suitably This gives
1 = A (x + 2) + B (x + 1) Equating the coefficients of x and the constant term, we get
A + B = 0
and
2A + B = 1
Solving these equations, we get A =1 and B = – 1