单选题 1分-|||-已知 (4)=24 ,则 dfrac (1(4-i)-i(0))(2v)=0-|||-⊙1

7.已知-1 -2)=1/3 (-1 -4)( -1 0-|||-2-|||-1 4-|||-且-|||--1 -1-|||-dfrac (1)(3) -1 -

_(0)=2;-|||-(3) dfrac (1)({2)^2} , _(0)=-1;-|||-(4) dfrac (1)(4-3z), _(0)=1+i;-|

10.单选题-|||-。已知 (A)=P(B)=P(C)=dfrac (1)(4) :(AB)=0, (AC)=P(BC)=dfrac (1)(16) ,则-|

设矩阵1 0 0-|||-=dfrac (1)(2) __ 0 2 1-|||-0 3 2，则1 0 0-|||-=dfrac (1)(2) __ 0 2 1-

12.[单选题]-|||-设随机变量 X-N(0,4) ,则 Xgeqslant 0 =( ) ()-|||-A 1-|||-B dfrac (1)(2)

4.设 (z)=dfrac (1)(z)-zsin dfrac (1)({z)^2}, 则 [ f(z),0] =-|||-(A)1; (B)2; (C)0;

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

矩阵0 1 0-|||-1 2 3-|||-2 3 4，则0 1 0-|||-1 2 3-|||-2 3 4。0 1 0-|||-1 2 3-|||-2 3 4

.A=A= (& -dfrac (1)(12) 0& 4& -24 0& 0& dfrac (1)(5) -12 6 0-|||--2 -5 4

计算下列行列式：4 3 2 1-|||-_(1)= 2 -2 0-|||-3 2 1 0-|||--4 0 0；4 3 2 1-|||-_(1)= 2 -2 0