1.

\left| \begin array c c c 11 & 14 & 17 \\ 12 & 15 & 18 \\ 13 & 1619 \end array \right|

Answer»

|11 14 17|D= |12 15 18| |13 16 19|

R₃→R₃-R₂ and R₂→R₂-R₁|11 3 3||12 3 3|=D|13 3 3|

R₃→R₃-R₂

|11 3 0||12 3 0|=D|13 3 0|D=0



Discussion

No Comment Found