\[\frac{3x + 4}{x + 1} < 2\]
\[\frac{3x + 4}{x + 1} - 2^{\backslash x + 1} < 0\]
\[\frac{3x + 4 - 2 \cdot (x + 1)}{x + 1} < 0\]
\[\frac{3x + 4 - 2x - 2}{x + 1} < 0\]
\[\frac{x + 2}{x + 1} < 0\ \]
\[Ответ:( - 2;\ - 1).\]