Find the Partial Fraction Decomposition $$\frac { 3 x - 1 } { x ( x + 1 ) } = \frac { A } { x } + \frac { B } { x + 1 }$$

Multiple Choice

Find the partial fraction decomposition.
- $$\frac { 3 x - 1 } { x ( x + 1 ) } = \frac { A } { x } + \frac { B } { x + 1 }$$

A) $\mathrm { A } = - 1 , \mathrm {~B} = 4$
B) $A = 1 , B = 4$
C) $\mathrm { A } = - 1 , \mathrm {~B} = - 4$
D) $\mathrm { A } = 1 , \mathrm {~B} = - 4$