\frac { 2 x + 3 } { ( x + 1 ) ( x - 3 ) } = \frac { A } { x + 1 } + \f – InterviewSolution

1.	\frac { 2 x + 3 } { ( x + 1 ) ( x - 3 ) } = \frac { A } { x + 1 } + \frac { B } { x - 3 } , \text { then find } A + B
Answer» A+B=9/4 + (-1/4)=9/4-1/4=2

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