函數(shù)圖像及函數(shù)方程(學(xué)生版)

1、WD格式整理專(zhuān)業(yè)資料值得擁有函數(shù)圖像與函數(shù)方程【知識(shí)要點(diǎn)】1.函數(shù)圖象變換(1)平移變換(2)對(duì)稱(chēng)變換①；)(xfy?――→關(guān)于x軸對(duì)稱(chēng))(xfy??②；)(xfy?――→關(guān)于y軸對(duì)稱(chēng))(xfy??③；)(xfy?――→關(guān)于原點(diǎn)對(duì)稱(chēng))(xfy???④.)10(???aaayx且――→關(guān)于y＝x對(duì)稱(chēng))10(log???aaxya且(3)翻折變換①.)(xfy?――――――――――→保留x軸上方圖像將x軸下方圖像翻折上去|)(|xfy?②.

2、)(xfy?――――――――――――→保留y軸右邊圖像，并作其關(guān)于y軸對(duì)稱(chēng)的圖像|)(|xfy?(4)伸縮變換①.)(xfy?)(axfy?②.)(xfy?)(xafy?2.函數(shù)的零點(diǎn)(1)函數(shù)零點(diǎn)的定義對(duì)于函數(shù)，把使的實(shí)數(shù)叫做函數(shù)的零點(diǎn)))((Dxxfy??0)(?xfx))((Dxxfy??(2)幾個(gè)等價(jià)關(guān)系方程有實(shí)數(shù)根函數(shù)的圖象與軸有交點(diǎn)函數(shù)有零點(diǎn)0)(?xf?)(xfy?x?)(xfy?(3)函數(shù)零點(diǎn)的判定(零點(diǎn)存在性定理)如果