把下面行列式化为三角形行列式,并求其值 2 —5 3 1 1 3 —1 3 0 1 1 —5 —1 —4 2 —3
把下面行列式化为三角形行列式,并求其值 2 —5 3 1 1 3 —1 3 0 1 1 —5 —1 —4 2 —3
数学人气:829 ℃时间:2020-02-05 09:59:59
优质解答
2 -5 3 1 1 3 -1 3 0 1 1 -5-1 -4 2 -3r1 + 2r4,r2 + r40 -13 7 -5 0 -1 1 0 0 1 1 -5-1 -4 2 -3r1 + 13r3,r2 + r30 0 20 -70 0 0 2 -5 0 1 1 -5-1 -4 2 -3r1 - 10r20 0 0 -20 0 0 2 -5 0 1 1 -5-1 -4 2 -3r1r4,r2r3...
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