Question

矩阵A的第一行元素是（1,0,5）,第二行元素是（0,2,0）,则矩阵A乘以A的转置

Answer 1

|1 0 5| |1 0 5| T

|0 2 0| |0 2 0|

=|> |1 0|

|1 0 5| |0 2|

|0 2 0| |5 0|

=|>

|(1)(1)+(0)(0)+(5)(5) (1)(0)+(0)(2)+(5)(0)|

|(0)(1)+(2)(0)+(0)(5) (0)(0)+(2)(2)+(0)(0)|

=|>

|26 0|

|0 4|