已知點(diǎn)P關(guān)于原點(diǎn)對(duì)稱的點(diǎn)是Q.Q關(guān)于y軸對(duì)稱的點(diǎn)是R.則點(diǎn)R的坐標(biāo)是A. B. C.(9.2) D. 查看更多

 

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已知點(diǎn)P關(guān)于x軸對(duì)稱點(diǎn)P1的坐標(biāo)是(2,3),則P點(diǎn)關(guān)于原點(diǎn)的對(duì)稱點(diǎn)P2的坐標(biāo)是

[  ]

A.(-2,3)

B.(2,-3)

C.(-2,-3)

D.(3,2)

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已知點(diǎn)M(a-1,2a+4)關(guān)于原點(diǎn)的對(duì)稱點(diǎn)在第三象限,則a的取值范圍是________.

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已知點(diǎn)A的坐標(biāo)為(-m,n),則點(diǎn)A關(guān)于原點(diǎn)對(duì)稱的點(diǎn)的坐標(biāo)是________.

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已知點(diǎn)P(x,y)的坐標(biāo)滿足方程(x-1)2=0,則點(diǎn)P關(guān)于原點(diǎn)的對(duì)稱點(diǎn)PO的坐標(biāo)是________.

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已知點(diǎn)A(a,-3)是點(diǎn)B(-2,b)關(guān)于原點(diǎn)O的對(duì)稱點(diǎn),則ab的值為

[  ]
A.

6

B.

-5

C.

5

D.

±6

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