Tìm \(P\) biết:\(\begin{align}&am...

Câu hỏi: Tìm \(P\) biết:\(\begin{align}& a)\frac{x-1}{{{x}^{2}}-x+1}-P=\frac{2}{x-1}+\frac{3x}{1-{{x}^{3}}} \\ & b)P+\frac{4x-12}{{{x}^{3}}-3{{x}^{2}}-4x+12}=\frac{3}{x-3}-\frac{{{x}^{2}}}{4-{{x}^{2}}} \\ \end{align}\)

A \(\begin{array}{l}
a)\,\,\,P = - \frac{1}{{x - 1}}\\
b)\,\,P = \frac{x}{{x + 3}}
\end{array}\)

B \(\begin{array}{l}
a)\,\,\,P = - \frac{1}{{x - 1}}\\
b)\,\,P = \frac{x}{{x - 3}}
\end{array}\)

C \(\begin{array}{l}
a)\,\,\,P =  \frac{1}{{x - 1}}\\
b)\,\,P = \frac{x}{{x - 3}}
\end{array}\)

D \(\begin{array}{l}
a)\,\,\,P =  \frac{1}{{x - 1}}\\
b)\,\,P = \frac{x}{{x + 3}}
\end{array}\)