點(diǎn)P(3,a)與點(diǎn)Q(b,2)關(guān)于y軸對(duì)稱(chēng),則a=
2
2
,b=
-3
-3
分析:根據(jù)關(guān)于y軸對(duì)稱(chēng)點(diǎn)的坐標(biāo)特點(diǎn):橫坐標(biāo)互為相反數(shù),縱坐標(biāo)不變可直接得到答案.
解答:解:∵點(diǎn)P(3,a)與點(diǎn)Q(b,2)關(guān)于y軸對(duì)稱(chēng),
∴b=-3,a=2,
故答案為:2;-3.
點(diǎn)評(píng):此題主要考查了關(guān)于y軸對(duì)稱(chēng)點(diǎn)的坐標(biāo)特點(diǎn),關(guān)鍵是掌握點(diǎn)的坐標(biāo)的變化規(guī)律.
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