A matrix is a rectangular array of numbers. A matrix with m rows and n columns is called an m × n matrix. The plural of matrix is matrices. A matrix with the same number of rows as columns is called equal if they have the same number of rows and the same number of columns and the corresponding entries in every position are equal

1.设f(x)在[a,b]上可积,g(x)在[a,b]上定义,且在[a,b中除了有限个点之外,都有f(x)=g(x),证明g(x)在[a,b]上也可积,并且有

在极限lim[1+a(x)]a(x)中,只要a(x)是无穷小,就有 lim[+a(x) ](x)=e. 这是因为,令u=,则u→∞,于是

2.等价向量组:设向量组T1:a1,a2,…,a,T2:B1,B2,…,B 若a(i=1,2,,r)可由B1,B2,…,B线性表示称T可由T2线性表示;

(1)a1,a2,…,an线性相关兮 ranka