A.118/60 B.119/19 C.109/36 D.107/60
[单选题]1/2,1,4/3,19/12,( )A.133/60B.137/60C.107/60D.147/60
[单选题]1/2,1,4/3,19/12,______ ( )A.118/60B.119/19C.109/36D.107/60
[单选题]已知=(3,5,-2),0=(2,1,4),要使λ+μ与=(0,0,1)垂直,则常数λ与μ应满足关系()。A . λ0=2μB . λ=μC . μ0=2λD . λ=-μ
[单选题]已知A=(3,5,-2),0B=(2,1,4),要使λA+μB与C=(0,0,1)垂直,则常数λ与μ应满足关系()。A . λ0=2μB . λ=μC . μ0=2λD . λ=-μ
[主观题]1/21/31/41/61/12
[单选题]12, 3,4, 2, 2, 1, ( )。A.4B.8C.1D.2
[单选题]12,3,4,2,2,1,( )。A.4B.8C.1D.2
[单选题]2,5,1,12,3,2,2,14,2,1,7,36,4,( ),3A.1B.2C.3D.4
[问答题]在线性空间R3中,已知向量a1=(1,2,1),a2=(2,1,4),a3=(0,-3,2),记V1={λa1+μa2|λ,μ∈R},V2={ka3|
[单选题]1/3,4/7 ,7/11 ,2/3 ,13/19 ,( )A. 16/21B. 16/23C. 18/21D. 17/21