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歡迎您訪問(wèn)數(shù)學(xué)考題練習(xí):點(diǎn)A(1,m)在函數(shù)y=3x的圖象上,則點(diǎn)A關(guān)!

數(shù)學(xué)考題練習(xí):點(diǎn)A(1,m)在函數(shù)y=3x的圖象上,則點(diǎn)A關(guān)

更新時(shí)間:2024-01-12 16:36:12作者:貝語(yǔ)網(wǎng)校

點(diǎn)A(1,m)在函數(shù)y=3x的圖象上,則點(diǎn)A關(guān)于y軸的對(duì)稱(chēng)點(diǎn)坐標(biāo)為_(kāi)_______.

試題答案

(-1,3)

試題解析

根據(jù)點(diǎn)A在函數(shù)圖象上,把坐標(biāo)代入解析式求m;點(diǎn)A關(guān)于y軸的對(duì)稱(chēng),其對(duì)稱(chēng)點(diǎn)橫坐標(biāo)互為相反數(shù),縱坐標(biāo)不變.

解答:把點(diǎn)A(1,m)代入y=3x中,得m=3,

所以,A(1,3);

點(diǎn)A關(guān)于y軸的對(duì)稱(chēng)點(diǎn)坐標(biāo)為(-1,3).

點(diǎn)評(píng):本題考查了圖象上點(diǎn)的坐標(biāo)求法,軸對(duì)稱(chēng)與點(diǎn)的坐標(biāo)關(guān)系的問(wèn)題.

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