1.已知二次函數(shù)y=x²-2x-3,若點(diǎn)P(-2,5)與點(diǎn)Q關(guān)于該二次函數(shù)的圖像的對(duì)稱軸對(duì)稱,則點(diǎn)Q的坐標(biāo)是_____

1.已知二次函數(shù)y=x²-2x-3,若點(diǎn)P(-2,5)與點(diǎn)Q關(guān)于該二次函數(shù)的圖像的對(duì)稱軸對(duì)稱,則點(diǎn)Q的坐標(biāo)是_____
2.在函數(shù)y=根號(hào)5-x中,自變量x的取值范圍是_____,當(dāng)y=2時(shí),x的值為_____
3.計(jì)算
（1）|1-2根號(hào)2|-根號(hào)8+(1/3)的-1次方

數(shù)學(xué)人氣：249 ℃時(shí)間：2019-10-26 11:02:40

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