Question

设A是n级方阵,α是n维列向量,若αAn-1≠0,而αAn=0,试证明α,Aα,…,An-1α 线性无关.

Answer 1

K1a+k2Aa+…+kn An-1a=0,等式两边乘以An-1,得K1=0,然后乘以An-2得k2=0,…最后乘以1,得kn=0