7.在空間直角坐標(biāo)系中.已知點(diǎn)P.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 ②點(diǎn)P關(guān)于yOz平面對(duì)稱點(diǎn)的坐標(biāo)是 ③點(diǎn)P關(guān)于y軸對(duì)稱點(diǎn)的坐標(biāo)是 ④點(diǎn)P關(guān)于原點(diǎn)對(duì)稱的點(diǎn)的坐標(biāo)是A3 B2 C1 D0 查看更多

 

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2、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)

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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.3B.2C.1D.0

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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

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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

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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

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