《线性代数》(第四版)教学课件首页上一页下一页结束性质5111211112112112212121212nniiinisisinsnsssnsssnnnnnnnnnaaaaaaaaaakaakaakaaaaaaaaaaaaa由性质4右端可写成证111211112111121121212121212121212nnniiinsssniiinsssnsssnsssnnnnnnnnnnnnnaaaaaaaaaaaakakakaaaaaaaaaaaaaaaaaaaaaa...