行列式 求值D=|1 -1 2 -1||1 1 1 1||0 1 2 1||2 0 0 4|求(1)A41+A42+A43+A44(2)A41+2A42+3A43+4A44显而易见(1)的答案是0,我的问题是第二问我这样做为什么和答案不一样:(2)-(1) 得原式=A42+2A43+3A44又 A42=A43=0故原式=3A4
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![行列式 求值D=|1 -1 2 -1||1 1 1 1||0 1 2 1||2 0 0 4|求(1)A41+A42+A43+A44(2)A41+2A42+3A43+4A44显而易见(1)的答案是0,我的问题是第二问我这样做为什么和答案不一样:(2)-(1) 得原式=A42+2A43+3A44又 A42=A43=0故原式=3A4](/uploads/image/z/7058888-8-8.jpg?t=%E8%A1%8C%E5%88%97%E5%BC%8F+%E6%B1%82%E5%80%BCD%3D%7C1+-1+2+-1%7C%7C1+1+1+1%7C%7C0+1+2+1%7C%7C2+0+0+4%7C%E6%B1%82%281%29A41%2BA42%2BA43%2BA44%282%29A41%2B2A42%2B3A43%2B4A44%E6%98%BE%E8%80%8C%E6%98%93%E8%A7%81%281%29%E7%9A%84%E7%AD%94%E6%A1%88%E6%98%AF0%2C%E6%88%91%E7%9A%84%E9%97%AE%E9%A2%98%E6%98%AF%E7%AC%AC%E4%BA%8C%E9%97%AE%E6%88%91%E8%BF%99%E6%A0%B7%E5%81%9A%E4%B8%BA%E4%BB%80%E4%B9%88%E5%92%8C%E7%AD%94%E6%A1%88%E4%B8%8D%E4%B8%80%E6%A0%B7%EF%BC%9A%282%29-%281%29+%E5%BE%97%E5%8E%9F%E5%BC%8F%3DA42%2B2A43%2B3A44%E5%8F%88+A42%3DA43%3D0%E6%95%85%E5%8E%9F%E5%BC%8F%3D3A4)
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