Hard-integral-determinant-a-b-c-f-g-h-j-k-l-dl-dk-dj-dh-dg-df-dc-db-da-

Question Number 202418 by MathematicalUser2357 last updated on 26/Dec/23

Hard integral

\int \int \int \int \int \int \int \int \int | \begin{matrix} a & b & c \\ f & g & h \\ j & k & l \end{matrix} | d l d k d j d h d g d f d c d b d a =

Answered by Frix last updated on 26/Dec/23

Not hard at all

= \frac{a b c f g h j k l}{8} (a (g l - h k) - b (f l - h j) + c (f k - g j))

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