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
举一反三
- 下图所示机构自由度计算,( )是正确的。 A: mg src="http://p.ananas.chaoxing.com/star3/origin/cb07ca0fb12be985c301490389c1e187.jpg" B: F=3×7 –(2×9 + 2 – 2)– 2 = 1 C: F=3×7 –(2×9+ 2– 0)– 0 = 1 D: F=3×7 –(2×8+ 2 – 0)– 2 = 1 E: F=3×5 –(2×6+ 2– 0)– 0 = 1
- f(x)在[0,1]上有连续的二阶导数,f(0)=f(1)=0,任意x属于[0,...715af2ac3f81f8.png"]
- 若行列式,则等于 /sqp/img?f=b8e456d47e95c99ec5d61e7639caa4ab.files%2Fimage003.pnghttps://p.ananas.chaoxing.com/star3/origin/a799a13c5bc2208779b07bed72cc3739.png
- 若是由抛物线与直线所围的闭区域, 在上连续,则 ____/sqp/img?f=0a08d1103a8caee030e6ba8042c26667.files%2Fimage001.png/ananas/latex/p/7563/sqp/img?f=0a08d1103a8caee030e6ba8042c26667.files%2Fimage003.png/ananas/latex/p/147/sqp/img?f=0a08d1103a8caee030e6ba8042c26667.files%2Fimage001.png/sqp/img?f=0a08d1103a8caee030e6ba8042c26667.files%2Fimage005.png
- 设函数f(x)=a|x|(a>0),且f(2)=4,则( ) A: f(-1)>f(-2) B: f(1)>f(2) C: f(2)<f(-2) D: f(-3)>f(-2)