\[(p - 1)x^{2} + (p - 2)x + (3p - 1) < 0\]
\[Не\ имеет\ решений\ при\ \]
\[(p - 1) > 0;D < 0:\]
\[p - 1 > 0\]
\[p > 1.\]
\[D = (p - 2)^{2} - 4(p - 1)(3p - 1) =\]
\[= p^{2} - 4p + 4 - 4\left( 3p^{2} - 3p - p + 1 \right) =\]
\[= p^{2} - 4p + 4 - 12p^{2} + 16p - 4 =\]
\[= - 11p^{2} + 12p\]
\[- 11p^{2} + 12p < 0\]
\[11p\left( p - \frac{12}{11} \right) > 0\]
\[p < 0;\ \ p > \frac{12}{11};\]
\[p > 1\frac{1}{11}.\]
\[Ответ:при\ p > 1\frac{1}{11}.\]