以下命题是正确的是（ ），且说明理由：（1）对任何矩阵[tex=0.786x1.286]pi/GsQ3apuRt43V3XQq/tA==[/tex]，均有[tex=6.5x1.286]eeb0mFps8SKnQkWxOqAtAKW7+kYhtBAqF1BawLp1vDs=[/tex]（2）[tex=4.357x1.286]Sj/JOIq8D/l1bCecGAbz+Q==[/tex]均为n(n>1)阶方阵，若[tex=6.071x3.643]1eZEffPkvcqd83uGfmH6ioXTGp7TfX9Y4cEwvB0Es2YFcy03+rrxqBOM9P1YKqSU[/tex]，则[tex=9.286x1.286]5GdstVAK2mQUVvrXhqEBXY2ZGYJWvTOSCeQpgWxlaIU=[/tex]（3）[tex=4.357x1.286]Sj/JOIq8D/l1bCecGAbz+Q==[/tex]均为n阶方阵，若[tex=6.071x3.643]1eZEffPkvcqd83uGfmH6ioXTGp7TfX9Y4cEwvB0Es2YFcy03+rrxqBOM9P1YKqSU[/tex]，则[tex=6.714x3.643]oP+BLGjds3y+VSstZfflkb9xRNC7gx/Ut8HlyumVgQ3wpm8lKVEPnHh+4IQyw6I0[/tex]（4）[tex=2.0x1.286]cdFQTIcX/k6W15SnnVIOSQ==[/tex]为n(n>1)阶方阵则[tex=9.143x3.643]yKJGwDiIqTdEIZzZw4fSc8b0wn+Z85oKP+XBQo8jFhMJJiT/gspC0k7R1ZucniCQaK9zQzWKkQoOs+eZQ9Pkew==[/tex]（5）[tex=2.0x1.286]cdFQTIcX/k6W15SnnVIOSQ==[/tex]为可逆矩阵，则[tex=4.5x1.286]vwxT16I4QZZNLIV0+aktXg==[/tex]有唯一解[tex=6.5x1.286]2cgMZ4runK/xBXek6dPfdr8+pK73Hbsh9VFZEYYjxE4=[/tex]（6）[tex=9.857x4.643]De166nmeTkb4C/83+ZZH22fNNwRVswy6uT3vQQd8pgT/95tf/antj9R0FEWf59PmQAi09E1UKVl0JJWxdUKuPUyBB+NPd52QqXEQhU15dCD3CSNCTBp8+3ECSZeBeJXaPcbkUgVkPr0ETWsG/kJWpeXrhxVoE+J7OXip6m7dqzSU/N1btrmRg0mGPIxEDbqI2QPJeIh4NWlWy6dfYtyIQA==[/tex]等价于[tex=9.5x4.786]dEdrC9SQsN/3Vx39SaFo4B8usezbIl6DKXEaWVywG/LIYCszsJlNVQJcvKDn5F1NLkIGhJERp247l3yiN0cRXNQA3kiyO/E+P1HrO8u6i0DcWAfv2Pda8l9dQvH/BvFZaWHh73ucJyB581Uia5BEHSePHRdvii+7yDrRZ8nRrBI98gYkXotPisz/zG20foQ9hSRnF6F7YKB7xVURe38tOw==[/tex]