Question

Rezolvati matricea !!!!!

Answer 1

Răspuns:

Explicație pas cu pas:

A×B=

$\left[\begin{array}{ccc}1&2&3\\2&4&b\\\end{array}\right] \cdot\left[\begin{array}{ccc}1&-2\\1&-2\\1&2\end{array}\right] =\left[\begin{array}{ccc}0&0\\0&0\\\end{array}\right]$

$\left[\begin{array}{ccc}6&0\\6+b&-12+2b\\\end{array}\right] =\left[\begin{array}{ccc}0&0\\0&0\\\end{array}\right]$

6+b=0

b=-6