If A = \(\begin{bmatrix}5 & 7\\4 & 6 \end{bmatrix}\), then what can be said about 14\( { A }^{ -1 } \)?
Answer & explanation
Correct answer: option 1
\( { A }^{ -1 } \) =\(\frac{adj A}{|A|}\)
so, |A| = 2
So, \(14 { A }^{ -1 } \) =\(\frac{14×adj A}{2}\)
so, \(14{ A }^{ -1 } = 7 (adj A)\)