A.1-1 B.-1-1 C.0-1 D.0+1
[单选题]39-1,38+2,37-3,36+1,35-2,34+3,…第40项为( )A.1-1 B.-1-1 C.0-1 D.0+1
【例2】某校检测20名女生的体重如下:(单位:千克)35,31,33,35,37,39,35,38,40,39,36,34,35,37,36,32,34,35,
[试题]计算:(1)-34(2)-(-3)3(3)-(-2/3)4(4)(4/5)2(5)-3/22(6)-(-2/5)3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 25 26 27 28 29 30 31 32 33
[单选题]2,5,1,12,3,2,2,14,2,1,7,36,4,( ),3A.1B.2C.3D.4
[单选题]:(1 234+234 1+34 1 2+4 1 23)÷(1+2+3+4)=( )A.1003B.2000C.1111D.1000
设2 -2 -4-|||-= -1 3 4-|||-1 -2 -3,2 -2 -4-|||-= -1 3 4-|||-1 -2 -3,且2 -2 -4-|||-
已知矩阵A= 1 -1 1 2 2 3 3 2 3 2 4 4 ,则矩阵秩A= 1 -1 1 2 2 3 3 2 3 2 4 4 =__________A
设2 -2 -4 2 -3 -5-|||-A= -1 3 4 B= -1 4 5-|||-1 -2 -3 1 -3 -4(1)验证2 -2 -4 2 -3 -5
设行列式1 -2 3 1-|||-4 -1 4 -2-|||-3 2 0 2-|||-3 -2 3 1,求1 -2 3 1-|||-4 -1 4 -2-|||-