设置曲面边界样式为红色粗线条。
A: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},BoundaryStyle→Directive[Red,Thick]]
B: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{x,-2,2},{y,-2,2}]
C: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{y,-2,2},{x,-2,2}]
D: Plot3D[x^2+y^2,{y,-2,2},{x,-2,2},BoundaryStyle→Directive[Red,Thick]]
A: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},BoundaryStyle→Directive[Red,Thick]]
B: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{x,-2,2},{y,-2,2}]
C: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{y,-2,2},{x,-2,2}]
D: Plot3D[x^2+y^2,{y,-2,2},{x,-2,2},BoundaryStyle→Directive[Red,Thick]]
举一反三
- 设置曲面边界样式为红色粗线条。 A: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},BoundaryStyle→Directive[Red,Thick]] B: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{x,-2,2},{y,-2,2}] C: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{y,-2,2},{x,-2,2}] D: Plot3D[x^2+y^2,{y,-2,2},{x,-2,2},BoundaryStyle→Directive[Red,Thick]]
- 在环形区域[img=136x26]18030733be53638.png[/img]上， 绘制函数图形[img=129x27]18030733c6c9cd6.png[/img] A: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},Exclusions→Function[{x,y},0.5<x^2+y^2<2]] B: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},RegionFunction→Function[{x,y},0.5<x^2+y^2<2]] C: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},RegionFunction→Function[{x,y},2>x^2+y^2>0.5]] D: Plot3D[x^2+y^2,{y,-2,2},{x,-2,2},Exclusions→Function[{x,y},0.5<x^2+y^2<2]]
- 求解方程组[img=218x63]1803072f0e0e849.png[/img]接近 (2,2) 的解 A: FindRoot[{x^2+y^2==5Sqrt[x^2+y^2]-4x,y==x^2},{x,2},{y,2}] B: NSolve[{x^2+y^2==5Sqrt[x^2+y^2]-4x,y==x^2},{x,2},{y,2}] C: FindRoot[{x^2+y^2==5Sqrt[x^2+y^2]-4x,y==x^2},{x,y},{2,2}] D: FindRoots[{x^2+y^2=5Sqrt[x^2+y^2]-4x,y=x^2},{x,2},{y,2}]
- 求解方程组[img=218x63]1803072e5daced1.png[/img]接近 (2,2) 的解 A: NSolve[{x^2+y^2==5Sqrt[x^2+y^2]-4x,y==x^2},{x,2},{y,2}] B: FindRoot[{x^2+y^2==5Sqrt[x^2+y^2]-4x,y==x^2},{x,2},{y,2}] C: FindRoot[{x^2+y^2==5Sqrt[x^2+y^2]-4x,y==x^2},{x,y},{2,2}] D: FindRoots[{x^2+y^2=5Sqrt[x^2+y^2]-4x,y=x^2},{x,2},{y,2}]
- （x，y）A（-2，-2）B（-2，2）C（0，1）D（2，2）E（2，-2）（2x，2y）A、（，）B、（，）C、（，）D、（，）E、（，）