设3阶行列式|a_(11) & a_(12) & a_(13) a_(21) & a_(22) & a_(23) a_(31) & a_(32) & a_(33)|=（）.

9.|}a_(11)&a_(12)&a_(13)a_(21)&a_(22)&a_(23)a_(31)&a_(32)&am

& a_(1n) a_(21) & a_(22) & ... & a_(2n) vdots & vdots &

& a_(1n) a_(21) & a_(22) & ... & a_(2n) vdots & vdots &

n阶行列式}&&a_(2,n-1)&...&a_(n1)&A.对B.错我的答案：√ 错本题得分：3分20.（判断题，3

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

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_(

1.设A_(1)，A_(2)是[0，1]的可测子集，且mA_(1)+mA_(2)>1，则m(A_(1)cap A_(2))>01.设$A_{1}$，$A_{2}

在六阶行列式中项a_(32)a_(54)a_(41)a_(65)a_(13)a_(26)所带的符号是____.第1空第2空二、填空题（共7题，35.0分）12.

3.若a_(12)a_(3i)a_(2k)a_(51)a_(44)是5阶行列式中带“+”的项，则i=____；k=____.3.若$a_{12}a_{3i}a_

(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