Phép toán nào sau đây không thực hiện được:

A. (left( {begin{array}{*{20}{c}}

1&2\

5&0

end{array},,,,,begin{array}{*{20}{c}}

{ – 3}&6\

7&9

end{array}} right) + left( {begin{array}{*{20}{c}}

{ – 5}&1\

{ – 2}&8

end{array},,,,,begin{array}{*{20}{c}}

{ – 3}&0\

{ – 4}&2

end{array}} right))

B. (left( {begin{array}{*{20}{c}}

1&{2,,,,,5}\

3&{4,,,,,,7}

end{array}} right) + left( {begin{array}{*{20}{c}}

4&3\

2&9

end{array}} right))

C. ( – 3left( {begin{array}{*{20}{c}}

1&2\

5&0

end{array},,,,,begin{array}{*{20}{c}}

{ – 3}&6\

7&9

end{array}} right))

D. (0left( {begin{array}{*{20}{c}}

{ – 5}&1\

{ – 2}&8

end{array},,,,,begin{array}{*{20}{c}}

{ – 3}&0\

{ – 4}&2

end{array}} right))

Hướng dẫn

Chọn B là đáp án đúng