題目列表(包括答案和解析)
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);
其中正確敘述的個(gè)數(shù)是( )
A.3 B.2
C.1 D.0
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
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
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
3
2
1
0
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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