若行列式,则等于 /sqp/img?f=b8e456d47e95c99ec5d61e7639caa4ab.files%2Fimage003.pnghttps://p.ananas.chaoxing.com/star3/origin/a799a13c5bc2208779b07bed72cc3739.png
举一反三
- 设,其中;又 其中,试利用二重积分的几何意义说明与之间的关系./sqp/img?f=2f17fe58198a286af46cfbf48ec2d04d.files%2Fimage009.pnghttps://p.ananas.chaoxing.com/star3/origin/754ba804b45e87e6f578aa3617bebf06.png/sqp/img?f=2f17fe58198a286af46cfbf48ec2d04d.files%2Fimage011.png/sqp/img?f=2f17fe58198a286af46cfbf48ec2d04d.files%2Fimage012.pnghttps://p.ananas.chaoxing.com/star3/origin/c9d52b4692fa648970aeba85853ee9a0.png/sqp/img?f=2f17fe58198a286af46cfbf48ec2d04d.files%2Fimage014.png
- 在△ABC中，AB＝3，AC＝2，BC＝，则等于( ) A: 2 B: 4 C: 3 D: 5
- 如图，若DE∥BC，且DE:BC＝3:5，则AD:DB等于（）． A: 2:3 B: 3:2 C: 3:5 D: 5:3
- 在 中, , ,则 等于https://p.ananas.chaoxing.com/star3/origin/98366284d8feecd580613938380206ea.pnghttps://p.ananas.chaoxing.com/star3/origin/526e25c58361a406de96a44862df7aba.pnghttps://p.ananas.chaoxing.com/star3/origin/04970d84ab61ade1077625be94ccdd96.pnghttps://p.ananas.chaoxing.com/star3/origin/7a34359614a39bd8fbffa909e85a630f.png
- X是随机变量,其分布函数为,则X为落在内的概率。/sqp/img?f=ef9fff84cb6806f93f3977617fd06e32.files%2Fimage001.pnghttps://p.ananas.chaoxing.com/star3/origin/10ffbaeb0acc1fe577542ecb859cc9ae.png/sqp/img?f=ef9fff84cb6806f93f3977617fd06e32.files%2Fimage010.png