通过点（5，-4,3）且垂直于向量i+ j+k 的平面方程是_______
A: y=-4
B: (x-5)/1=(y+4)/1=(z-3)/1
C: x+y+z=4
D: 5x-4y+3z=-4
A: y=-4
B: (x-5)/1=(y+4)/1=(z-3)/1
C: x+y+z=4
D: 5x-4y+3z=-4
举一反三
- 通过点（5，-4, 3）且垂直于向量 j 的平面方程是_______ A: y=-4 B: x+y+z=4 C: (x-5)+(z-3)=0 D: 5x-4y+3z=-4
- 执行以下语句的结果：dict1={"x":1,"y":2,"z":3}dict2={"x":4,"a":5}dict1.update(dict2) A: {"x":1,"y":2,"z":3,"x":4,"a":5} B: {"x":4,"a":5,"x":1,"y":2,"z":3} C: 有重复项，结果有误！ D: {"x":4,"y":2,"z":3,"a":5}
- int x = 3 , y = 4 , z = 5 则表达式!( x y ) z – 1
- int x=3,y,z;<br/>y=-x++;<br/>z=y+8/++x;<br/>Console.WriteLine{{0},{1},{2}",x,y,z);<br/>此程序的输出结果是____。 A: 5,-3,-2 B: 4,-3,-1 C: 4,-4,-2 D: 5,-4,-2
- 若x=[1 2 3 4 5];y=[2 -1 4 3 -2];则z=x.*y=()