1 1-|||-已知α= 1 ,= 2 , =alpha beta ^T, 求A^4.-|||-1 0

设向量0 1 2-|||-(alpha )_(1)= 1 _(2)= 1 ,beta = 1-|||--1 1 3，则0 1 2-|||-(alpha )_(1

4.已知alpha=(1,1,-1)^T,beta=(1,2,1)^T,A=alphabeta^T,f(x)=(x-1)^3,求f(A)4.已知$\alpha=

已知(alpha )_(1)=((1,1,2,2))^T, (alpha )_(2)=((1,-1,4,0))^T (alpha )_(3)=((1,0,3,1

向量组1 0 1-|||-_(1)= 0 _(2)= 1 (alpha )_(3)= 1-|||-0 0 11 0 1-|||-_(1)= 0 _(2)= 1

已知向量组I: (alpha )_(1)=((1,1,4))^T, (alpha )_(2)=((1,0,4))^T, _(3)=((1,2,{a)^2+3)}

[问答题] 已知，，（1）求tan2α的值：（2）求β。

8.已知alpha=(1,2,3),beta=(1,(1)/(2),(1)/(3)),矩阵A=alpha^Tbeta,其中alpha^T是alpha的转置，求A

1 0 0-|||-、已知A= 0 dfrac (1)(2) dfrac (3)(2) 求([ {({A)^*)}^T] }^-1-|||-0 1 5/2

已知向量组(alpha )_(1)=(1,0,2,0), (alpha )_(2)=(0,-1,1,2), (alpha )_(3)=(1,-2,4,4)(al

13.试用初等变换法，(1)求向量组alpha_(1)=(1,4,1,0)^T,alpha_(2)=(2,1,-1,-3)^T,alpha_(3)=(1,0,-