Partial fractions

1. May 6, 2008

sara_87

1. The problem statement, all variables and given/known data

we have 4/((s^2) + 4)(s-1)(s+3)

2. Relevant equations

3. The attempt at a solution

dividing it up do we get:

A/((s^2) + 4) + B/(s-1) + C/(s+3) = 4

or is it

(As + B)/((s^2) + 4) + C/(s-1) + D/(s+3) = 4

2. May 6, 2008

HallsofIvy

The second one. Since the denominator s2+ 4 is quadratic the numerator may be As+ B.

3. May 6, 2008

cheers!