计算下列行列式
展开全部
r(n+1)-rn*(c1/a1)、...、r2n-r1*(cn/an)
D2n=|an...................................................bn|
.........................................
.....................a1 b1.........................
.....................0 d1-b1c1/a1.............
...........................................
0.............................................dn-bncn/an
=(∏ai)*(∏(di-bici/ai)) 【i=1 to n】
=∏(aidi-bici) 【i=1 to n】
D2n=|an...................................................bn|
.........................................
.....................a1 b1.........................
.....................0 d1-b1c1/a1.............
...........................................
0.............................................dn-bncn/an
=(∏ai)*(∏(di-bici/ai)) 【i=1 to n】
=∏(aidi-bici) 【i=1 to n】
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