求行列式,求大神的详细解决方法~~
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用任意两行或两列相减,经过变换后的两行(或两列)成比例,结果为0!
比如: r3-r2、r2-r1
r1: 1+x1y1 , 1+x1y2, 1+x1y3, ...., 1+x1yn
r2: y1(x2-x1), y2(x2-x1), y3(x2-x1), ....., yn(x2-x1)
r3: y1(x3-x2), y2(x3-x2), y3(x3-x2), ....., yn(x3-x2)
........................
其中,r2:r3=(x2-x1)/(x3-x2) 即两行成比例!
比如: r3-r2、r2-r1
r1: 1+x1y1 , 1+x1y2, 1+x1y3, ...., 1+x1yn
r2: y1(x2-x1), y2(x2-x1), y3(x2-x1), ....., yn(x2-x1)
r3: y1(x3-x2), y2(x3-x2), y3(x3-x2), ....., yn(x3-x2)
........................
其中,r2:r3=(x2-x1)/(x3-x2) 即两行成比例!
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