По формулам крамера решить систему уравнений x1+2x2=-1,-3x1+x3=-2,x1+x2+x3=1

Определитель равен [latex] \left[\begin{array}{ccc}1&2&0\\-3&0&1\\1&1&1\end{array}\right] = = 0-1-2*(-4)+0=7[/latex] Ax = [latex] \left[\begin{array}{ccc}-1&2&0\\-2&0&1\\1&1&1\end{array}\right] =1-2*(-2-1)=7 [/latex] Ay = [latex] \left[\begin{array}{ccc}1&-1&0\\-3&-2&1\\1&1&1\end{array}\right] = -3-3-1=-7[/latex] Az = [latex] \left[\begin{array}{ccc}1&2&-1\\-3&0&-2\\1&1&1\end{array}\right] =2-2*(-3+2)+3=7[/latex] x1 = 7/7 =1 x2 = (-7)/7 = -1 x3 = 7/7 = 1