Question

Matrix and unlimited fun help! thanks in advance

Answer 1

\[\left[ \frac{ 8 }{ 2 } \frac{ 23 }{ 6 }\right]^{-1}\]

Answer 2

see http://www.mathwords.com/i/inverse_of_a_matrix.htm
and look for "shortcut for 2 x 2 matrix"

Answer 3

here is my answer \[\left[ \frac{ 6 }{ -2 } \frac{ (\frac{ -23 }{ 2 }) }{ 4}\right]\]

Answer 4

so, where's the "unlimited fun" at? :P

Answer 5

is this the matrix => \(\left\lbrack
\begin{matrix}
8 & 23\\
2 & 6\\
\end{matrix}
\right\rbrack\) ?

Answer 6

ok, but you should divide all 4 terms inside the matrix by the determinate = 2

Answer 7

you get
\[\frac{ 1 }{ 2 }\left[\begin{matrix}6 & -23 \\ -2 & 8\end{matrix}\right]\]

the 1/2 out front multiplies every entry inside the matrix