Linear Differential Equations in Kinematics

[P3X-018]

Well, but I don't have so much experience in seprating fractions :'(. How do you seprate the fraction
$$\frac{1}{1\pm u}$$

 

[arildno]

Well, but I don't have so much experience in seprating fractions :'(. How do you seprate the fraction
$$\frac{1}{1\pm u}$$

Those can't be decomposed further, but:
$$\frac{1}{1-u^{2}}=\frac{1}{2}(\frac{1}{1+u}+\frac{1}{1-u})$$
$$\frac{1}{1+u^{2}}$$ cannot be partially fractiondecomposed in real partial fractions.