设向量a=(1,2),b=(4,2),则( )/ananas/latex/p/107490
举一反三
- 设Ω{1,2,…,10},{2,3,4},{3,4,5},则/ananas/latex/p/1591/ananas/latex/p/37739/ananas/latex/p/37740/ananas/latex/p/502945
- 设集合,下列说法中确切的数量有个 (1); (2); (3); (4);/ananas/latex/p/1802644/ananas/latex/p/954674/ananas/latex/p/954669/ananas/latex/p/954660/ananas/latex/p/954656
- 若为共线的单位向量,则它们的数量积( )/ananas/latex/p/20561/ananas/latex/p/107490
- 设X~N(μ,4),Y~N(μ,9),a=P{Xμ-2},b=P{Yμ+3},则/ananas/latex/p/1237/ananas/latex/p/990
- 设p:a=2,q:;则()/ananas/latex/p/98203