已知 [img=93x25]180365a3ec5bc89.png[/img],[img=79x25]180365a3f5ba08a.png[/img] 和 [img=79x25]180365a3fdc663a.png[/img],则与线段[img=109x23]180365a4073208b.png[/img]同时垂直的向量为
A: (3,-2,-2)
B: (-3,2,-2)
C: (3,2,-3)
D: (-3,2,-3)
A: (3,-2,-2)
B: (-3,2,-2)
C: (3,2,-3)
D: (-3,2,-3)
举一反三
- 求不定积分[img=121x54]17da653839aa6ae.png[/img]; ( ) A: log(x^2 + 3*x + 25/4)/4 + (5*atan(x/2 + 3/4))/4 B: log(x^2 + 3*x + 25/4)/4 C: (5*atan(x/2 + 3/4))/4 D: log(x^2 + 3*x + 25/4)/4 - (5*atan(x/2 + 3/4))/4
- 已知[img=60x51]17d60ac01f3dff0.png[/img],则x=() A: 3 B: -3 C: -2 D: 2
- 已知[img=52x29]18038be96ed0534.png[/img],[img=115x51]18038be97866e95.png[/img],在MATLAB中若想由x生成矩阵A可调用命令 A: A=[x,x.^2,x.^3] B: A=[x,x^2,x^3] C: A=[x;x.^2;x.^3] D: A=[x;x^2;x^3]
- 已知[img=52x29]1802e9891f49f72.png[/img],[img=115x51]1802e989277fcbc.png[/img],在MATLAB中若想由x生成矩阵A可调用命令 A: A=[x,x.^2,x.^3] B: A=[x,x^2,x^3] C: A=[x;x.^2;x.^3] D: A=[x;x^2;x^3]
- 已知[img=52x29]1803bbd8531a1be.png[/img],[img=115x51]1803bbd85b65619.png[/img],在MATLAB中若想由x生成矩阵A可调用命令 A: A=[x,x.^2,x.^3] B: A=[x,x^2,x^3] C: A=[x;x.^2;x.^3] D: A=[x;x^2;x^3]