2019-04-07 15:44发布
1、|A1, 2A3, A2|=2|A1, A3, A2|=-2|A1, A2, A3|=-2×(-2)=4.
2、|A3-2A1, 3A2, A1|=|A3, 3A2, A1|-2|A1, 3A2, A1|=3|A3, A2, A1|-0=-3|A1, A2, A3|=6.
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1、|A1, 2A3, A2|=2|A1, A3, A2|=-2|A1, A2, A3|=-2×(-2)=4.
2、|A3-2A1, 3A2, A1|=|A3, 3A2, A1|-2|A1, 3A2, A1|=3|A3, A2, A1|-0=-3|A1, A2, A3|=6.
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