1.在空間直角坐標(biāo)系中.已知點(diǎn)P(x.y.z).下列敘述中正確的個(gè)數(shù)是 ( ) ①點(diǎn)P關(guān)于x軸對(duì)稱點(diǎn)的坐標(biāo)是P1(x.-y.z) ②點(diǎn)P關(guān)于yOz平面對(duì)稱點(diǎn)的坐標(biāo)是P2(x.-y.-z) ③點(diǎn)P關(guān)于y軸對(duì)稱點(diǎn)的坐標(biāo)是P3(x.-y.z) ④點(diǎn)P關(guān)于原點(diǎn)對(duì)稱的點(diǎn)的坐標(biāo)是P4(-x.-y.-z) A.3 B.2 C.1 D.0 查看更多

 

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在空間直角坐標(biāo)系中,已知點(diǎn)P(xy,z),關(guān)于下列敘述

①點(diǎn)P關(guān)于x軸對(duì)稱點(diǎn)的坐標(biāo)是P1(x,-y,z);

②點(diǎn)P關(guān)于yOz平面對(duì)稱點(diǎn)的坐標(biāo)是P2(x,-y,-z);

③點(diǎn)P關(guān)于y軸對(duì)稱點(diǎn)的坐標(biāo)是P3(x,-y,z);

④點(diǎn)P關(guān)于原點(diǎn)對(duì)稱點(diǎn)的坐標(biāo)是P4(-x,-y,-z);

其中正確敘述的個(gè)數(shù)是(  )

A.3        B.2     

C.1        D.0

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在空間直角坐標(biāo)系中,已知點(diǎn)P(x,y,z),關(guān)于下列敘述
①點(diǎn)P關(guān)于x軸對(duì)稱點(diǎn)的坐標(biāo)是P1(x,-y,z);
②點(diǎn)P關(guān)于yOz平面對(duì)稱點(diǎn)的坐標(biāo)是P2(x,-y,-z);
③點(diǎn)P關(guān)于y軸對(duì)稱點(diǎn)的坐標(biāo)是P3(x,-y,z);
④點(diǎn)P關(guān)于原點(diǎn)對(duì)稱點(diǎn)的坐標(biāo)是P4(-x,-y,-z).

其中正確的敘述的個(gè)數(shù)是


  1. A.
    1
  2. B.
    2
  3. C.
    3
  4. D.
    4

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在空間直角坐標(biāo)系中,已知點(diǎn)P(x,y,z),關(guān)于下列敘述

①點(diǎn)P關(guān)于x軸對(duì)稱點(diǎn)的坐標(biāo)是P1(x,-y,z);

②點(diǎn)P關(guān)于yOz平面對(duì)稱點(diǎn)的坐標(biāo)是P2(x,-y,-z);

③點(diǎn)P關(guān)于y軸對(duì)稱點(diǎn)的坐標(biāo)是P3(x,-y,z);

④點(diǎn)P關(guān)于原點(diǎn)對(duì)稱點(diǎn)的坐標(biāo)是P4(-x,-y,-z).

其中正確的敘述的個(gè)數(shù)是

[  ]

A.1

B.2

C.3

D.4

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在空間直角坐標(biāo)系中,已知點(diǎn)P(x,y,z),關(guān)于下列敘述

①點(diǎn)P關(guān)于x軸對(duì)稱的坐標(biāo)是P1(x,-y,z)

②點(diǎn)P關(guān)于yox軸對(duì)稱的坐標(biāo)是P2(x,-y,-z)

③點(diǎn)P關(guān)于y軸對(duì)稱的坐標(biāo)是P3(x,-y,z)

④點(diǎn)P關(guān)于原點(diǎn)對(duì)稱的坐標(biāo)是P4(-x,-y,-z),其中正確的個(gè)數(shù)是

[  ]
A.

3

B.

2

C.

1

D.

0

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在空間直角坐標(biāo)系中,已知點(diǎn)P(x,y,z),關(guān)于下列敘述

①點(diǎn)P關(guān)于x軸對(duì)稱的坐標(biāo)是P1(x,-y,z)

②點(diǎn)P關(guān)于yox軸對(duì)稱的坐標(biāo)是P2(x,-y,-z)

③點(diǎn)P關(guān)于y軸對(duì)稱的坐標(biāo)是P3(x,-y,z)

④點(diǎn)P關(guān)于原點(diǎn)對(duì)稱的坐標(biāo)是P4(-x,-y,-z),其中正確的個(gè)數(shù)是

[  ]

A.3

B.2

C.1

D.0

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