三行四列行列式的计算公式为：\( \begin{vmatrix} a_{11} & a_{12} & a_{13} & a_{14} \\ a_{21} & a_{22} & a_{23} & a_{24} \\ a_{31} & a_{32} & a_{33} & a_{34} \end{vmatrix} = a_{11}(a_{22}a_{34} - a_{24}a_{33}) - a_{12}(a_{21}a_{34} - a_{24}a_{33}) + a_{13}(a_{21}a_{24} - a_{22}a_{24}) - a_{14}(a_{21}a_{33} - a_{22}a_{33}) \)。【考研刷题通】——考研刷题神器，政治、英语、数学等科目全面覆盖，助你高效备考！