新高考數(shù)學(xué)一輪復(fù)習(xí)講練測第4章第03講 三角函數(shù)的圖象與性質(zhì)(練習(xí))(解析版)_第1頁
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第03講三角函數(shù)的圖象與性質(zhì)(模擬精練+真題演練)1.(2023·陜西西安·陜西師大附中??寄M預(yù)測)將函數(shù)SKIPIF1<0的圖像向右平移SKIPIF1<0個單位長度,得到函數(shù)SKIPIF1<0的圖像,則下列正確的是(

)A.直線SKIPIF1<0是SKIPIF1<0圖像的一條對稱軸 B.SKIPIF1<0的最小正周期為SKIPIF1<0C.SKIPIF1<0的圖像關(guān)于點SKIPIF1<0對稱 D.SKIPIF1<0在SKIPIF1<0上單調(diào)遞增【答案】C【解析】由SKIPIF1<0SKIPIF1<0,則SKIPIF1<0圖像向右平移SKIPIF1<0個單位長度可得,SKIPIF1<0,因為SKIPIF1<0,所以SKIPIF1<0不是SKIPIF1<0圖像的一條對稱軸,A錯;由SKIPIF1<0,得SKIPIF1<0的最小正周期為SKIPIF1<0,B錯;由SKIPIF1<0,所以點SKIPIF1<0是SKIPIF1<0圖像的一個對稱中心,C正確;由SKIPIF1<0,則SKIPIF1<0,所以SKIPIF1<0在SKIPIF1<0上有增有減,D錯.故選:C2.(2023·四川成都·石室中學(xué)??寄M預(yù)測)函數(shù)SKIPIF1<0圖象的對稱軸可以是(

)A.直線SKIPIF1<0 B.直線SKIPIF1<0C.直線SKIPIF1<0 D.直線SKIPIF1<0【答案】A【解析】SKIPIF1<0,令SKIPIF1<0,解得SKIPIF1<0,所以SKIPIF1<0的對稱軸為直線SKIPIF1<0,當(dāng)SKIPIF1<0時,SKIPIF1<0.故選:A.3.(2023·河南·襄城高中校聯(lián)考三模)將函數(shù)SKIPIF1<0的圖象上所有點向右平移SKIPIF1<0個單位長度,然后橫坐標(biāo)伸長為原來的2倍,縱坐標(biāo)不變,得到函數(shù)SKIPIF1<0的圖象,則SKIPIF1<0在區(qū)間SKIPIF1<0上的值域為(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】C【解析】將SKIPIF1<0的圖象上所有點的橫坐標(biāo)縮短為原來的SKIPIF1<0,縱坐標(biāo)不變得到SKIPIF1<0的圖象,再將SKIPIF1<0圖象上所有點向左平移SKIPIF1<0個單位長度得到SKIPIF1<0的圖象.當(dāng)SKIPIF1<0時,SKIPIF1<0,SKIPIF1<0.故選:C.4.(2023·重慶·統(tǒng)考模擬預(yù)測)已知函數(shù)SKIPIF1<0,若對于任意實數(shù)x,都有SKIPIF1<0,則SKIPIF1<0的最小值為(

)A.2 B.SKIPIF1<0 C.4 D.8【答案】C【解析】因為對于任意實數(shù)x,都有SKIPIF1<0,則有函數(shù)SKIPIF1<0圖象關(guān)于點SKIPIF1<0對稱,因此SKIPIF1<0,解得SKIPIF1<0,而SKIPIF1<0,所以當(dāng)SKIPIF1<0時,SKIPIF1<0取得最小值4.故選:C5.(2023·河南·校聯(lián)考模擬預(yù)測)某次實驗得交變電流SKIPIF1<0(單位:A)隨時間SKIPIF1<0(單位:s)變化的函數(shù)解析式為SKIPIF1<0,其中SKIPIF1<0且SKIPIF1<0,其圖象如圖所示,則下列說法錯誤的是(

A.SKIPIF1<0 B.SKIPIF1<0C.當(dāng)SKIPIF1<0時,SKIPIF1<0 D.當(dāng)SKIPIF1<0時,SKIPIF1<0【答案】D【解析】由題知SKIPIF1<0,則SKIPIF1<0,又SKIPIF1<0,則SKIPIF1<0,所以當(dāng)SKIPIF1<0時,SKIPIF1<0,則SKIPIF1<0,又SKIPIF1<0,則SKIPIF1<0,因此SKIPIF1<0,所以當(dāng)SKIPIF1<0時,SKIPIF1<0,當(dāng)SKIPIF1<0時,SKIPIF1<0,因此ABC正確,D錯誤,故選:D.6.(2023·北京西城·北師大實驗中學(xué)??既#┰谙铝兴膫€函數(shù)中,在定義域內(nèi)單調(diào)遞增的有(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】C【解析】A.SKIPIF1<0的增區(qū)間為SKIPIF1<0,在整個定義域上不單調(diào),故錯誤;B.SKIPIF1<0的增區(qū)間是SKIPIF1<0,在整個定義域上不單調(diào),故錯誤;C.SKIPIF1<0在R上遞增,故正確;D.SKIPIF1<0的增區(qū)間是SKIPIF1<0,在整個定義域上不單調(diào),故錯誤;故選:C7.(2023·北京大興·??既#┮阎瘮?shù)SKIPIF1<0,SKIPIF1<0,將函數(shù)SKIPIF1<0的圖象經(jīng)過下列變換可以與SKIPIF1<0的圖象重合的是(

)A.向左平移SKIPIF1<0個單位 B.向左平移SKIPIF1<0個單位C.向右平移SKIPIF1<0個單位 D.向右平移SKIPIF1<0個單位【答案】D【解析】因為SKIPIF1<0,所以將SKIPIF1<0向右平移SKIPIF1<0個單位得到SKIPIF1<0.故選:D8.(2023·陜西咸陽·武功縣普集高級中學(xué)校考模擬預(yù)測)已知函數(shù)SKIPIF1<0,則關(guān)于SKIPIF1<0的下列結(jié)論不正確的是(

)A.SKIPIF1<0的圖象關(guān)于直線SKIPIF1<0對稱B.SKIPIF1<0的圖象關(guān)于點SKIPIF1<0對稱C.SKIPIF1<0在區(qū)間SKIPIF1<0上是單調(diào)遞減函數(shù)D.將SKIPIF1<0的圖象向左平移SKIPIF1<0個單位即可得到SKIPIF1<0的圖象【答案】D【解析】∵SKIPIF1<0,∴SKIPIF1<0的圖象關(guān)于直線SKIPIF1<0對稱,故A正確;∵SKIPIF1<0,∴SKIPIF1<0的圖象關(guān)于點SKIPIF1<0對稱,故B正確;令SKIPIF1<0,則SKIPIF1<0,函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上是減函數(shù),根據(jù)復(fù)合函數(shù)的單調(diào)性知,SKIPIF1<0在區(qū)間SKIPIF1<0上是單調(diào)遞減函數(shù),故C正確;∵SKIPIF1<0,∴將SKIPIF1<0的圖象向左平移SKIPIF1<0個單位即可得到SKIPIF1<0的圖象,而SKIPIF1<0時,SKIPIF1<0,故D錯誤,故選:D.9.(多選題)(2023·福建漳州·統(tǒng)考模擬預(yù)測)把函數(shù)SKIPIF1<0圖象上所有點的橫坐標(biāo)縮短到原來的SKIPIF1<0倍,縱坐標(biāo)不變,再把所得曲線向左平移SKIPIF1<0個單位長度,得到函數(shù)SKIPIF1<0的圖象,則(

)A.SKIPIF1<0在SKIPIF1<0上單調(diào)遞減B.SKIPIF1<0在SKIPIF1<0上有2個零點C.SKIPIF1<0的圖象關(guān)于直線SKIPIF1<0對稱D.SKIPIF1<0在SKIPIF1<0上的值域為SKIPIF1<0【答案】BC【解析】把函數(shù)SKIPIF1<0圖象上所有點的橫坐標(biāo)縮短到原來的SKIPIF1<0倍,縱坐標(biāo)不變,可得到SKIPIF1<0的圖象;再把所得曲線向左平移SKIPIF1<0個單位長度,得到函數(shù)SKIPIF1<0的圖象,SKIPIF1<0時,SKIPIF1<0,則SKIPIF1<0在SKIPIF1<0單調(diào)遞減,在SKIPIF1<0單調(diào)遞增,故A錯誤;令SKIPIF1<0,得SKIPIF1<0,即SKIPIF1<0,因為SKIPIF1<0,所以SKIPIF1<0,解得SKIPIF1<0,因為SKIPIF1<0,所以SKIPIF1<0或SKIPIF1<0,所以SKIPIF1<0在SKIPIF1<0上有2個零點,故B正確;因為SKIPIF1<0,為SKIPIF1<0的最大值,所以直線SKIPIF1<0是SKIPIF1<0的圖象的一條對稱軸,故C正確;當(dāng)SKIPIF1<0時,SKIPIF1<0,SKIPIF1<0,故D錯誤.故選:BC10.(多選題)(2023·江蘇鹽城·鹽城市伍佑中學(xué)??寄M預(yù)測)已知函數(shù)SKIPIF1<0的圖象向左平移SKIPIF1<0)個單位長度后對應(yīng)的函數(shù)為SKIPIF1<0,若SKIPIF1<0在SKIPIF1<0上單調(diào),則SKIPIF1<0的可?。?/p>

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】CD【解析】依題意,SKIPIF1<0,于是SKIPIF1<0,當(dāng)SKIPIF1<0時,SKIPIF1<0,當(dāng)SKIPIF1<0在SKIPIF1<0上單調(diào)遞增時,SKIPIF1<0,即SKIPIF1<0,解得SKIPIF1<0,不存在整數(shù)SKIPIF1<0使得SKIPIF1<0取得ABCD選項中的值;當(dāng)SKIPIF1<0在SKIPIF1<0上單調(diào)遞減時,SKIPIF1<0,即SKIPIF1<0,解得SKIPIF1<0,當(dāng)SKIPIF1<0時,SKIPIF1<0,CD符合,不存在整數(shù)SKIPIF1<0使得SKIPIF1<0取得AB選項中的值.故選:CD11.(多選題)(2023·廣東佛山·??寄M預(yù)測)已知函數(shù)SKIPIF1<0的初相為SKIPIF1<0,則下列結(jié)論正確的是(

)A.SKIPIF1<0的圖象關(guān)于直線SKIPIF1<0對稱B.函數(shù)SKIPIF1<0的一個單調(diào)遞減區(qū)間為SKIPIF1<0C.若把函數(shù)SKIPIF1<0的圖象向右平移SKIPIF1<0個單位長度得到函數(shù)SKIPIF1<0的圖象,則SKIPIF1<0為偶函數(shù)D.若函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上的值域為SKIPIF1<0【答案】AB【解析】由題意知SKIPIF1<0,所以SKIPIF1<0.對于選項A,SKIPIF1<0,所以SKIPIF1<0的圖象關(guān)于直線SKIPIF1<0對稱,故A項正確;對于選項B,由SKIPIF1<0,SKIPIF1<0,得SKIPIF1<0,SKIPIF1<0,則當(dāng)SKIPIF1<0時,函數(shù)SKIPIF1<0的一個單調(diào)遞減區(qū)間為SKIPIF1<0,故B項正確;對于選項C,SKIPIF1<0的圖象向右平移SKIPIF1<0個單位長度得到函數(shù)SKIPIF1<0的圖象,所以SKIPIF1<0為奇函數(shù),故C項錯誤;對于選項D,因為SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,即:SKIPIF1<0在區(qū)間SKIPIF1<0上的值域為SKIPIF1<0,故D項錯誤.故選:AB.12.(多選題)(2023·湖南衡陽·衡陽市八中??寄M預(yù)測)已知函數(shù)SKIPIF1<0,其圖象相鄰對稱軸間的距離為SKIPIF1<0,點SKIPIF1<0是其中的一個對稱中心,則下列結(jié)論正確的是(

)A.函數(shù)SKIPIF1<0的最小正周期為SKIPIF1<0B.函數(shù)SKIPIF1<0圖象的一條對稱軸方程是SKIPIF1<0C.函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上單調(diào)遞增D.將函數(shù)SKIPIF1<0圖象上所有點橫坐標(biāo)伸長原來的2倍,縱坐標(biāo)縮短原來的一半,再把得到的圖象向左平移SKIPIF1<0個單位長度,可得到正弦函數(shù)SKIPIF1<0的圖象【答案】ACD【解析】因為函數(shù)SKIPIF1<0圖象相鄰對稱軸間的距離為SKIPIF1<0,則SKIPIF1<0,即SKIPIF1<0,所以SKIPIF1<0正確;因為SKIPIF1<0,則SKIPIF1<0,即SKIPIF1<0,且點SKIPIF1<0是對稱中心,當(dāng)SKIPIF1<0時,SKIPIF1<0,即SKIPIF1<0SKIPIF1<0,又SKIPIF1<0,所以SKIPIF1<0,即SKIPIF1<0.令SKIPIF1<0,解得SKIPIF1<0,所以函數(shù)SKIPIF1<0的對稱軸為SKIPIF1<0,所以SKIPIF1<0錯誤;令SKIPIF1<0,解得SKIPIF1<0,函數(shù)SKIPIF1<0的單調(diào)增區(qū)間為:SKIPIF1<0,所以C正確;函數(shù)SKIPIF1<0圖象上所有點橫坐標(biāo)伸長原來的2倍,縱坐標(biāo)縮短原來的一半,得到SKIPIF1<0的圖象,再把得到的圖象向左平移SKIPIF1<0個單位長度,得函數(shù)SKIPIF1<0,所以SKIPIF1<0正確.故選:ACD.13.(2023·河北滄州·??寄M預(yù)測)若函數(shù)SKIPIF1<0為奇函數(shù),則SKIPIF1<0的最小值為______.【答案】SKIPIF1<0【解析】因為函數(shù)SKIPIF1<0為R上的奇函數(shù),所以SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,又SKIPIF1<0,所以SKIPIF1<0的最小值為SKIPIF1<0.故答案為:SKIPIF1<014.(2023·陜西咸陽·武功縣普集高級中學(xué)??寄M預(yù)測)已知SKIPIF1<0,當(dāng)SKIPIF1<0(其中SKIPIF1<0)時,SKIPIF1<0有且只有一個解,則SKIPIF1<0的取值范圍是____________.【答案】SKIPIF1<0【解析】由于SKIPIF1<0,所以SKIPIF1<0有且只有一個解,即SKIPIF1<0有且只有一個解,因為SKIPIF1<0,所以SKIPIF1<0,由題意知SKIPIF1<0,解得SKIPIF1<0,即SKIPIF1<0的取值范圍是為SKIPIF1<0,故答案為:SKIPIF1<015.(2023·江蘇鎮(zhèn)江·江蘇省鎮(zhèn)江中學(xué)校考三模)寫出一個同時具有下列性質(zhì)①②③,且定義域為實數(shù)集SKIPIF1<0的函數(shù)SKIPIF1<0__________.①最小正周期為2;②SKIPIF1<0;③無零點.【答案】SKIPIF1<0(答案不唯一)【解析】SKIPIF1<0的定義域為SKIPIF1<0,最小正周期為SKIPIF1<0,SKIPIF1<0因為SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0無零點,綜上,SKIPIF1<0符合題意故答案為:SKIPIF1<0.16.(2023·上海徐匯·位育中學(xué)校考模擬預(yù)測)若函數(shù)SKIPIF1<0的圖像向右平移SKIPIF1<0個單位長度后得到函數(shù)SKIPIF1<0的圖像,若對滿足SKIPIF1<0的SKIPIF1<0,SKIPIF1<0,有SKIPIF1<0的最小值為SKIPIF1<0,則SKIPIF1<0________.【答案】SKIPIF1<0【解析】由函數(shù)SKIPIF1<0的圖像向右平移SKIPIF1<0,可得SKIPIF1<0由SKIPIF1<0可知一個取得最大值一個取得最小值,不妨設(shè)SKIPIF1<0取得最大值,SKIPIF1<0取得最小值,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.可得SKIPIF1<0,所以SKIPIF1<0,SKIPIF1<0的最小值為SKIPIF1<0,SKIPIF1<0,得SKIPIF1<0,故答案為:SKIPIF1<0.17.(2023·湖南岳陽·統(tǒng)考模擬預(yù)測)已知函數(shù)SKIPIF1<0的部分圖象如圖所示.(1)求SKIPIF1<0的最小正周期及解析式;(2)將函數(shù)SKIPIF1<0的圖象向右平移SKIPIF1<0個單位長度得到函數(shù)SKIPIF1<0的圖象,求函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上的最大值和最小值.【解析】(1)由圖象可知SKIPIF1<0的最大值為1,最小值-1,故SKIPIF1<0;又SKIPIF1<0∴SKIPIF1<0,將點SKIPIF1<0代入SKIPIF1<0,SKIPIF1<0∴SKIPIF1<0,∵SKIPIF1<0∴SKIPIF1<0故答案為:SKIPIF1<0,SKIPIF1<0.(2)由SKIPIF1<0的圖象向右平移SKIPIF1<0個單位長度得到函數(shù)SKIPIF1<0∵SKIPIF1<0∴SKIPIF1<0∴當(dāng)SKIPIF1<0時,即SKIPIF1<0,SKIPIF1<0;當(dāng)SKIPIF1<0時,即SKIPIF1<0,SKIPIF1<0故答案為:SKIPIF1<018.(2023·黑龍江哈爾濱·哈爾濱市第六中學(xué)校校考三模)已知函數(shù)SKIPIF1<0,其圖象的一條對稱軸與相鄰對稱中心的橫坐標(biāo)相差SKIPIF1<0,______,從以下兩個條件中任選一個補充在空白橫線中.①函數(shù)SKIPIF1<0的圖象向左平移SKIPIF1<0個單位長度后得到的圖象關(guān)于y軸對稱且SKIPIF1<0;②函數(shù)SKIPIF1<0的圖象的一個對稱中心為SKIPIF1<0且SKIPIF1<0.(1)求函數(shù)SKIPIF1<0的解析式;(2)將函數(shù)SKIPIF1<0圖象上所有點的橫坐標(biāo)變?yōu)樵瓉淼腟KIPIF1<0倍,縱坐標(biāo)不變,得到函數(shù)SKIPIF1<0的圖象,若函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上恰有3個零點,求t的取值范圍.【解析】(1)由題意可得SKIPIF1<0SKIPIF1<0,SKIPIF1<0,由于其圖象的一條對稱軸與相鄰對稱中心的橫坐標(biāo)相差SKIPIF1<0,故SKIPIF1<0,故SKIPIF1<0若選①,函數(shù)SKIPIF1<0的圖象向左平移SKIPIF1<0個單位長度后得到的圖象對應(yīng)的函數(shù)為SKIPIF1<0,由題意知該函數(shù)為偶函數(shù),故SKIPIF1<0,由于SKIPIF1<0且SKIPIF1<0,即SKIPIF1<0,故SKIPIF1<0,故SKIPIF1<0;若選②,函數(shù)SKIPIF1<0的圖象的一個對稱中心為SKIPIF1<0且SKIPIF1<0,則SKIPIF1<0,由于SKIPIF1<0且SKIPIF1<0,即SKIPIF1<0,故SKIPIF1<0,故SKIPIF1<0;(2)由題意可得SKIPIF1<0,由于SKIPIF1<0在區(qū)間SKIPIF1<0上恰有3個零點,故SKIPIF1<0,即SKIPIF1<0.19.(2023·湖南常德·常德市一中校考模擬預(yù)測)已知函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上恰有3個零點,其中SKIPIF1<0為正整數(shù).(1)求函數(shù)SKIPIF1<0的解析式;(2)將函數(shù)SKIPIF1<0的圖象向左平移SKIPIF1<0個單位得到函數(shù)SKIPIF1<0的圖象,求函數(shù)SKIPIF1<0的單調(diào)區(qū)間.【解析】(1)由SKIPIF1<0,得SKIPIF1<0,因為函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上恰有3個零點,于是SKIPIF1<0,解得SKIPIF1<0,而SKIPIF1<0為正整數(shù),因此SKIPIF1<0,所以SKIPIF1<0.(2)由(1)知,SKIPIF1<0,由SKIPIF1<0,得SKIPIF1<0,即有SKIPIF1<0,因此SKIPIF1<0,由SKIPIF1<0,解得SKIPIF1<0,所以函數(shù)SKIPIF1<0的單調(diào)減區(qū)間為SKIPIF1<0.20.(2023·黑龍江哈爾濱·哈師大附中校考模擬預(yù)測)將函數(shù)SKIPIF1<0的圖象先向右平移SKIPIF1<0個單位長度,再將所得函圖象上所有點的橫坐標(biāo)變?yōu)樵瓉淼腟KIPIF1<0(ω>0)倍(縱坐標(biāo)不變),得到函數(shù)SKIPIF1<0的圖象.(1)若SKIPIF1<0,求函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上的最大值;(2)若函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上沒有零點,求ω的取值范圍.【解析】(1)函數(shù)SKIPIF1<0的圖象先向右平移SKIPIF1<0個單位長度,則解析式變?yōu)椋篠KIPIF1<0,再將所得函圖象上所有點的橫坐標(biāo)變?yōu)樵瓉淼腟KIPIF1<0(ω>0)倍(縱坐標(biāo)不變),則解析式變?yōu)镾KIPIF1<0.則SKIPIF1<0.當(dāng)SKIPIF1<0時,SKIPIF1<0,因函數(shù)SKIPIF1<0在SKIPIF1<0上單調(diào)遞減,在SKIPIF1<0上單調(diào)遞增,SKIPIF1<0,SKIPIF1<0.∴SKIPIF1<0,∴SKIPIF1<0在區(qū)間SKIPIF1<0上的最大值為SKIPIF1<0.(2)SKIPIF1<0,當(dāng)SKIPIF1<0時,SKIPIF1<0,要使SKIPIF1<0在SKIPIF1<0上無零點,則SKIPIF1<0,SKIPIF1<0.SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,當(dāng)SKIPIF1<0時,SKIPIF1<0;當(dāng)SKIPIF1<0時,SKIPIF1<0,當(dāng)SKIPIF1<0時,SKIPIF1<0舍去.綜上:SKIPIF1<0的取值范圍為SKIPIF1<0.1.(2023?天津)已知函數(shù)SKIPIF1<0的一條對稱軸為直線SKIPIF1<0,一個周期為4,則SKIPIF1<0的解析式可能為SKIPIF1<0SKIPIF1<0A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】SKIPIF1<0【解析】SKIPIF1<0:若SKIPIF1<0,則SKIPIF1<0,令SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0,顯然SKIPIF1<0不是對稱軸,不符合題意;SKIPIF1<0:若SKIPIF1<0,則SKIPIF1<0,令SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0,故SKIPIF1<0是一條對稱軸,SKIPIF1<0符合題意;SKIPIF1<0,則SKIPIF1<0,不符合題意;SKIPIF1<0,則SKIPIF1<0,不符合題意.故選:SKIPIF1<0.2.(2022?天津)已知SKIPIF1<0,關(guān)于該函數(shù)有下列四個說法:①SKIPIF1<0的最小正周期為SKIPIF1<0;②SKIPIF1<0在SKIPIF1<0,SKIPIF1<0上單調(diào)遞增;③當(dāng)SKIPIF1<0,SKIPIF1<0時,SKIPIF1<0的取值范圍為SKIPIF1<0,SKIPIF1<0;④SKIPIF1<0的圖象可由SKIPIF1<0的圖象向左平移SKIPIF1<0個單位長度得到.以上四個說法中,正確的個數(shù)為SKIPIF1<0SKIPIF1<0A.1 B.2 C.3 D.4【答案】SKIPIF1<0【解析】對于SKIPIF1<0,它的最小正周期為SKIPIF1<0,故①錯誤;在SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,函數(shù)SKIPIF1<0單調(diào)遞增,故②正確;當(dāng)SKIPIF1<0,SKIPIF1<0時,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0的取值范圍為SKIPIF1<0,SKIPIF1<0,故③錯誤;SKIPIF1<0的圖象可由SKIPIF1<0的圖象向右平移SKIPIF1<0個單位長度得到,故④錯誤,故選:SKIPIF1<0.3.(2022?浙江)為了得到函數(shù)SKIPIF1<0的圖象,只要把函數(shù)SKIPIF1<0圖象上所有的點SKIPIF1<0SKIPIF1<0A.向左平移SKIPIF1<0個單位長度 B.向右平移SKIPIF1<0個單位長度 C.向左平移SKIPIF1<0個單位長度 D.向右平移SKIPIF1<0個單位長度【答案】SKIPIF1<0【解析】把SKIPIF1<0圖象上所有的點向右平移SKIPIF1<0個單位可得SKIPIF1<0的圖象.故選:SKIPIF1<0.4.(2022?新高考Ⅰ)記函數(shù)SKIPIF1<0的最小正周期為SKIPIF1<0.若SKIPIF1<0,且SKIPIF1<0的圖像關(guān)于點SKIPIF1<0,SKIPIF1<0中心對稱,則SKIPIF1<0SKIPIF1<0A.1 B.SKIPIF1<0 C.SKIPIF1<0 D.3【答案】SKIPIF1<0【解析】函數(shù)SKIPIF1<0的最小正周期為SKIPIF1<0,則SKIPIF1<0,由SKIPIF1<0,得SKIPIF1<0,SKIPIF1<0,SKIPIF1<0的圖像關(guān)于點SKIPIF1<0,SKIPIF1<0中心對稱,SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0.SKIPIF1<0SKIPIF1<0,SKIPIF1<0,取SKIPIF1<0,可得SKIPIF1<0.SKIPIF1<0,則SKIPIF1<0.故選:SKIPIF1<0.5.(2022?甲卷)將函數(shù)SKIPIF1<0的圖像向左平移SKIPIF1<0個單位長度后得到曲線SKIPIF1<0,若SKIPIF1<0關(guān)于SKIPIF1<0軸對稱,則SKIPIF1<0的最小值是SKIPIF1<0SKIPIF1<0A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】SKIPIF1<0【解析】將函數(shù)SKIPIF1<0的圖像向左平移SKIPIF1<0個單位長度后得到曲線SKIPIF1<0,則SKIPIF1<0對應(yīng)函數(shù)為SKIPIF1<0,SKIPIF1<0的圖象關(guān)于SKIPIF1<0軸對稱,SKIPIF1<0SKIPIF1<0,SKIPIF1<0,即SKIPIF1<0,SKIPIF1<0,則令SKIPIF1<0,可得SKIPIF1<0的最小值是SKIPIF1<0,故選:SKIPIF1<0.6.(2022?甲卷)設(shè)函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0恰有三個極值點、兩個零點,則SKIPIF1<0的取值范圍是SKIPIF1<0SKIPIF1<0A.SKIPIF1<0,SKIPIF1<0 B.SKIPIF1<0,SKIPIF1<0 C.SKIPIF1<0,SKIPIF1<0 D.SKIPIF1<0,SKIPIF1<0【答案】SKIPIF1<0【解析】當(dāng)SKIPIF1<0時,不能滿足在區(qū)間SKIPIF1<0極值點比零點多,所以SKIPIF1<0;函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0恰有三個極值點、兩個零點,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0SKIPIF1<0,求得SKIPIF1<0,故選:SKIPIF1<0.7.(多選題)(2022?新高考Ⅱ)已知函數(shù)SKIPIF1<0的圖像關(guān)于點SKIPIF1<0,SKIPIF1<0中心對稱,則SKIPIF1<0SKIPIF1<0A.SKIPIF1<0在區(qū)間SKIPIF1<0單調(diào)遞減 B.SKIPIF1<0在區(qū)間SKIPIF1<0,SKIPIF1<0有兩個極值點 C.直線SKIPIF1<0是曲線SKIPIF1<0的對稱軸 D.直線SKIPIF1<0是曲線SKIPIF1<0的切線【答案】SKIPIF1<0【解析】因為SKIPIF1<0的圖象關(guān)于點SKIPIF1<0,SKIPIF1<0對稱,所以SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,因為SKIPIF1<0,所以SKIPIF1<0,故SKIPIF1<0,令SKIPIF1<0,解得SKIPIF1<0,故SKIPIF1<0在SKIPIF1<0單調(diào)遞減,SKIPIF1<0正確;SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,根據(jù)函數(shù)的單調(diào)性,故函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0,SKIPIF1<0只有一個極值點,故SKIPIF1<0錯誤;令SKIPIF1<0,SKIPIF1<0,得SKIPIF1<0,SKIPIF1<0,SKIPIF1<0顯然錯誤;SKIPIF1<0,求導(dǎo)可得,SKIPIF1<0,令SKIPIF1<0,即SKIPIF1<0,解得SKIPIF1<0或SKIPIF1<0,故函數(shù)SKIPIF1<0在點SKIPIF1<0處的切線斜率為SKIPIF1<0,故切線方程為SKIPIF1<0,即SKIPIF1<0,故SKIPIF1<0正確.直線SKIPIF1<0顯然與SKIPIF1<0相切,故直線SKIPIF1<0顯然是曲線的切線,故SKIPIF1<0正確.故選:SKIPIF1<0.8.(2023?新高考Ⅱ)已知函數(shù)SKIPIF1<0,如圖,SKIPIF1<0,SKIPIF1<0是直線SKIPIF1<0與曲線SKIPIF1<0的兩個交點,若SKIPIF1<0,則SKIPIF1<0.【答案】SKIPIF1<0【解析】由題意:設(shè)SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0,由SKIPIF1<0的圖象可知:SKIPIF1<0,即SKIPIF1<0,SKIPIF1<0,又SKIPIF1<0,SKIPIF1<0SKIPIF1<0,SKIPIF1<0,即SKIPIF1<0,SKIPIF1<0,觀察圖象,可知當(dāng)SKIPIF1<0時,SKIPIF1<0滿足條件,SKIPIF1<0.故答案為:SKIPIF1<0.9.(2023?新高考Ⅰ)已知函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0,SKIPIF1<0有且僅有3個零點,則SKIPIF1<0的取值范圍是.【答案】SKIPIF1<0,SKIPIF1<0【解析】SKIPIF1<0,SKIPIF1<0,函數(shù)的周期為SKIPIF1<0,SKIPIF1<0,可得SKIPIF1<0,函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0,SKIPIF1<0有且僅有3個零點,可得SKIPIF1<0,所以SKIPIF1<0.故答案為:SKIPIF1<0,SKIPIF1<0.10.(2022?上海)函數(shù)SKIPIF1<0的周期為.【答案】SKIPIF1<0【解析】SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0,SKIPIF1<0.故答案為:SKIPIF1<0

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