【判断题】【消耗次数:1】
非齐次线性方程组Ax=b有解的充要条件是其系数矩阵的秩于增广矩阵的秩相等
正确
错误
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相关题目
【判断题】 非齐次线性方程组Ax=b有解的充要条件是系数矩阵的秩R(A)等于增广矩阵的秩R(A|b).
①  正确
②  错误
【单选题】 设元齐次线性方程组的通解为则矩阵的秩()
① 
② 
③ 
④  的每行元素之和都不等于零
【单选题】 非齐次线性方程组有解的充要条件是()
① 
② 
③  难确定
④  任意非零实数
【判断题】 n元齐次线性方程组Ax=0有非零解的充要条件是秩R(A)=n.
①  正确
②  错误
【单选题】 设A是m*n阶矩阵,齐次线性方程组Ax=0仅有零解的充要条件是()
①  A的列向量线性无关
②  A的列向量线性相关
③  A的行向量线性无关
④  A的行向量线性相关
【单选题】 设A是mn?矩阵,Ax?0是非齐次线性方程组Ax?b所对应的齐次线性方程组,则 下列结论正确的是( )
①  若 Ax?0仅有零解,则Ax?b有唯一解.
②  若Ax?0有非零解,则Ax?b有无穷多个解.
③  若 Ax?b有无穷多个解,则Ax?0仅有零解.
④  若Ax?b有无穷多个解,则Ax?0有非零解
【单选题】 设A是m*n阶矩阵,Ax=0是非齐次线性方程组Ax=b所对应的齐次线性方程组,则下列结论正确的是()
①  若Ax=0仅有零解,则Ax=b有唯一解
②  若Ax=0有非零解,则Ax=b有无穷多个解
③  若Ax=b有无穷多个解,则Ax=0仅有零解
④  若Ax=b有无穷多个解,则Ax=0有非零解
【判断题】 方程个数等于未知数个数的齐次线性方程组,有非零解得充要条件是系数矩阵的行列式等于零
①  正确
②  错误
【单选题】 设是矩阵,是非齐次线性方程组,则必有()
①  当时,有无穷多个解
②  当时,有惟一解
③  有无穷多解只有零解
④  有解向量可由的列向量组线性表示
【单选题】 设 A为mn?矩阵,齐次线性方程组Ax?0仅有零解的充分条件是( )
①  A的列向量线性无关
②  A的列向量线性相关
③  A的行向量线性无关.
④  A的行向量线性相关.
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【单选题】 With the help of the government , a large number of people ---_______ after the flood in 1991.
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【单选题】 A ____ is a person who ____ _____.
①  crime; commit; criminal
②  commit; criminal; crimes
③  commit; crimes; criminal
④  criminal; commits; crimes
【单选题】 The soldier was _____ of running away when the enemy attacked.
①  scolded
②  charged
③  accused
④  punished
【单选题】 The short story ____ the heart of the little boy with its unusual plot.
①  captured
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【单选题】 _____their differences,the couple were developing an obvious and genuine affection for each other .
①  But for
②  For all
③  Above all
④  Except for
【单选题】 Those acting for the defendant proposed to appeal ____ the sentence.
①  to
②  against
③  for
④  out
【单选题】 Which sport has the most expenses ____ training equipment, players’ personal equipment and uniforms?
①  in place of
②  in terms of
③  by means of
④  by way of
【单选题】 The pressure _____ causes Americans to be energetic, but it also puts them under a constant emotional strains.
①  to compete
②  competing
③  to be competed
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【单选题】 We should make a clear ____ between the two scientific terms for the purpose of our discussion.
①  separation
②  discrimination
③  deviation
④  distinction