[主观题]近似的 a. a_ _ _ _ _ _ _ _ _ _
[主观题]近似的；大约的 a. a_ _ _ _ _ _ _ _ _ _
在6阶行列式中，下列各项应带什么符号？(1) a_(23)a_(31)a_(42)a_(56)a_(14)a_(65);(2) a_(32)a_(43)a_(1
(6)设a_(1),a_(2),a_(3),a_(4)是n维向量，a_(1),a_(2)线性无关，a_(1),a_(2),a_(3)线性相关，且 a_(1)+a
在六阶行列式中，下列各项前应带什么符号？(1) a_(23) a_(31) a_(42) a_(56) a_(14) a_(65)；(2) a_(32) a_(
【2025年数学二真题，第16题】设矩阵A=(a_(1),a_(2),a_(3),a_(4))，若a_(1),a_(2),a_(3)线性无关，且a_(1)+a_
9.|}a_(11)&a_(12)&a_(13)a_(21)&a_(22)&a_(23)a_(31)&a_(32)&am
设3阶行列式|a_(11) & a_(12) & a_(13) a_(21) & a_(22) & a_(23) a_(31) & a_(32) & a_(
3.[判断题]设A_(1),A_(2),...,A_(n)为n个事件，若对任意的i，j(1≤i，j≤n)，均有P(A_(i)A_(j))=P(A_(i))P(A
15.设a_(1)，a_(2)是Ax=b的解，η是其导出组Ax=0的解，则（） (A）η+a_(1)是A.x=0的解 (B.)η+(a_(1)-a_(2))是