函數(shù)圖象第四節(jié)1/42課前·雙基落實(shí)知識(shí)回扣，小題熱身，基穩(wěn)才能樓高課堂·考點(diǎn)突破練透基點(diǎn)，研通難點(diǎn)，備考不留死角課后·三維演練分層訓(xùn)練，梯度設(shè)計(jì)，及時(shí)查漏補(bǔ)缺2/42知識(shí)回扣，小題熱身，基穩(wěn)才能樓高課前雙基落實(shí)3/42過(guò)基礎(chǔ)知識(shí)4/425/426/427/428/42過(guò)基礎(chǔ)小題9/4210/4211/4212/4213/4214/42練透基點(diǎn)，研通難點(diǎn)，備考不留死角課堂考點(diǎn)突破15/4216/4217/4218/4219/4220/4221/42方法特殊點(diǎn)法函數(shù)性質(zhì)法定義特殊點(diǎn)法就是依據(jù)函數(shù)解析式特點(diǎn)，結(jié)合函數(shù)性質(zhì)觀察函數(shù)圖象必過(guò)某個(gè)特殊點(diǎn)，從而識(shí)別函數(shù)圖象一個(gè)方法性質(zhì)檢驗(yàn)法就是依據(jù)函數(shù)解析式分析函數(shù)相關(guān)性質(zhì)(如定義域、值域、單調(diào)性、奇偶性等)排除干擾項(xiàng)，從而確定正確選項(xiàng)方法適用范圍適適用于由一些函數(shù)圖象上存在特殊點(diǎn)基本初等函數(shù)經(jīng)過(guò)初步變換得到函數(shù)圖象識(shí)別問(wèn)題適適用于對(duì)同一個(gè)坐標(biāo)系中兩類不一樣函數(shù)圖象判斷或?qū)τ蓛深惒灰粯宇愋秃瘮?shù)組合而成函數(shù)圖象識(shí)別22/42方法特殊點(diǎn)法函數(shù)性質(zhì)法解題思緒①找特殊點(diǎn)，依據(jù)已知函數(shù)解析式，找出函數(shù)圖象所經(jīng)過(guò)定點(diǎn)坐標(biāo)．②看變換，將題設(shè)條件所給出函數(shù)解析式經(jīng)過(guò)適當(dāng)化簡(jiǎn)或變形，再與基本初等函數(shù)對(duì)應(yīng)比較．③定選項(xiàng)，順著圖象變換展開，將得到變換圖象與所給選項(xiàng)對(duì)照①定位函數(shù)，經(jīng)過(guò)已知條件確定函數(shù)解析式類型．②研究性質(zhì)，分析所給函數(shù)基本性質(zhì)，常見有單調(diào)性、奇偶性等．③排除選項(xiàng)，逐一排除不符合函數(shù)基本性質(zhì)選項(xiàng)23/4224/4225/4226/4227/4228/4229/4230/4231/4232/4233/4234/4235/4236/4237/42看個(gè)性利用函數(shù)圖象研究函數(shù)性質(zhì)，經(jīng)過(guò)函數(shù)圖象特征與函數(shù)性質(zhì)之間對(duì)應(yīng)關(guān)系來(lái)處理問(wèn)題；角度(二)利用函數(shù)圖象研究不等式，經(jīng)過(guò)函數(shù)圖象把不等式問(wèn)題轉(zhuǎn)化為兩函數(shù)圖象上下關(guān)系或函數(shù)圖象與坐標(biāo)軸位置關(guān)系來(lái)處理問(wèn)題找共性求解函數(shù)圖象應(yīng)用問(wèn)題，其實(shí)質(zhì)是利用數(shù)形結(jié)合思想解題，其思維流