线性方程组 { a 11 x 1 + a 12 x 2 +⋯+ a 1n x n = b 1, a 21 x 1 + a 22 x 2 +⋯+ a 2n x n = b 2, ⋯⋯ ⋯⋯ a m1 x 1 + a m2 x 2 +⋯+ a mn x n = b m }的系数矩阵为 A,增广矩阵为 A ¯ ,则它有无穷多个解的充要条件为。 -题库考试答案搜索网

线性方程组 { a 11 x 1 + a 12 x 2 +⋯+ a 1n x n = b 1, a 21 x 1 + a 22 x 2 +⋯+ a 2n x n = b 2, ⋯⋯ ⋯⋯ a m1 x 1 + a m2 x 2 +⋯+ a mn x n = b m }的系数矩阵为 A,增广矩阵为 A ¯ ,则它有无穷多个解的充要条件为。

单选题

2021-09-01 21:01

A、R(A)=R( A ¯ )<n
B、R(A)=R( A ¯ )<m
C、R(A)<R( A ¯ )<m
D、R(A)=R( A ¯ )=m

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正确答案

A

试题解析

标签：青书学堂河北建筑工程学院电气工程及其自动化线性代数

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