pheral waterproof layer must not touch losses component shall not be modified. (F) the exterior Windows of Windows and doors project this project uses aluminum alloy Windows, residential entry door to door, other doors installed by the owners themselves. Window and door installation position: outside the door in the wall, outside the window in the wall. 1, preparation: after installationРРaxaxaxb，，，, ？,11112211nn,axaxaxb，，，, ？,21122222nn?、; ,？？？？？？？？？？？,,axaxaxb，，，,？mmnmnn1122,Рaaaxb？,,,,,,1112111n,,,,,,aaaxb？2122222n,,,,,,?、(向量方程，为矩阵，个方程，mn，m,,,AxbA,,,,,,？？？？？？,,,,,,aaaxb？mmmnmm12,,,,,,Р个未知数) nРxb,,,,11,,,,bx22,,,,?、(全部按列分块，其中); ,,,aaa？,，，12n,,,,？？,,,,bxn,,n,,Р?、(线性表出) axaxax，，，,？,1122nnР?、有解的充要条件:(为未知数的个数或维数) rArAn()(,),,,nР4、向量组的线性相关性 1. 个维列向量所组成的向量组:构成矩阵; ,,,,,,？A,(,,,),,,？mnnm，A12m12m
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