Trong không gian Oxyz, cho 3 điểm

B

- Hướng dẫn giải

\(\begin{array}{l}\left( {MNP} \right):ax + by + cy + d = 0{\rm{ }}\left( {{a^2} + {b^2} + {c^2} > 0} \right).\\\left\{ \begin{array}{l}a + 2c = d = 0\\ - 3a - 4b + c + d = 0\\2a + 5b + 3c + d = 0\end{array} \right. \Leftrightarrow \left\{ \begin{array}{l}a = \frac{d}{{31}}\\b = \frac{{3d}}{{31}}\\c = \frac{{ - 16d}}{{31}}\end{array} \right.\\\left( {MNP} \right):x + 3y - 16z + 31 = 0\end{array}\)