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專(zhuān)題36導(dǎo)數(shù)放縮證明不等式必刷100題1.已知函數(shù)SKIPIF1<0.(1)求SKIPIF1<0的最大值;(2)若SKIPIF1<0恒成立,求實(shí)數(shù)SKIPIF1<0的取值范圍;(3)求證:SKIPIF1<0.2.已知函數(shù)SKIPIF1<0.(1)求函數(shù)SKIPIF1<0的極值;(2)(i)當(dāng)SKIPIF1<0時(shí),SKIPIF1<0恒成立,求正整數(shù)SKIPIF1<0的最大值;(ii)證明:SKIPIF1<0.3.已知函數(shù)SKIPIF1<0.(1)求SKIPIF1<0的極大值點(diǎn)和極小值點(diǎn);(2)若函數(shù)SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0.4.已知函數(shù)SKIPIF1<0.(1)求SKIPIF1<0的最大值;(2)若SKIPIF1<0恒成立,求實(shí)數(shù)SKIPIF1<0的取值范圍;(3)求證:SKIPIF1<0SKIPIF1<05.已知函數(shù)SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0;(2)當(dāng)SKIPIF1<0時(shí),若函數(shù)SKIPIF1<0有兩個(gè)不同的零點(diǎn),求實(shí)數(shù)a的取值范圍.6.已知函數(shù)SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),求SKIPIF1<0的單調(diào)區(qū)間.(2)SKIPIF1<0,證明:SKIPIF1<0.7.設(shè)函數(shù)SKIPIF1<0,SKIPIF1<0.(1)若SKIPIF1<0,求a的值(2)證明:SKIPIF1<0.8.已知函數(shù)SKIPIF1<0.(1)判斷SKIPIF1<0的單調(diào)性;(2)證明:SKIPIF1<0.9.已知函數(shù)SKIPIF1<0.(1)求SKIPIF1<0在點(diǎn)SKIPIF1<0處的切線(xiàn)方程;(2)已知函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上不存在極值點(diǎn),求SKIPIF1<0的取值范圍;(3)證明:SKIPIF1<0,SKIPIF1<0.10.設(shè)函數(shù)SKIPIF1<0.(1)討論函數(shù)SKIPIF1<0的單調(diào)性;(2)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0.11.已知函數(shù)SKIPIF1<0.(1)求函數(shù)SKIPIF1<0的極值;(2)求證:SKIPIF1<0.12.已知函數(shù)SKIPIF1<0,SKIPIF1<0,SKIPIF1<0SKIPIF1<0.(1)求SKIPIF1<0的最大值;(2)若對(duì)SKIPIF1<0,總存在SKIPIF1<0,使得SKIPIF1<0成立,求實(shí)數(shù)SKIPIF1<0的取值范圍;(3)證明不等式SKIPIF1<0(其中SKIPIF1<0是自然對(duì)數(shù)的底數(shù)).13.已知函數(shù)SKIPIF1<0,SKIPIF1<0.(1)若SKIPIF1<0恒成立,求實(shí)數(shù)m的取值范圍;(2)求證:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0.14.已知函數(shù)SKIPIF1<0.(1)求函數(shù)SKIPIF1<0在SKIPIF1<0上的最小值;(2)證明:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0.15.已知函數(shù)SKIPIF1<0.(1)若SKIPIF1<0,求SKIPIF1<0在SKIPIF1<0處的切線(xiàn)方程;(2)若SKIPIF1<0是函數(shù)SKIPIF1<0的極值點(diǎn),且SKIPIF1<0,求證:SKIPIF1<0.16.已知函數(shù)SKIPIF1<0(1)若SKIPIF1<0,求SKIPIF1<0的值;(2)證明:對(duì)任意的正整數(shù)SKIPIF1<0,SKIPIF1<0.17.已知函數(shù)f(x)=lnx-x+1.(1)求函數(shù)f(x)的單調(diào)區(qū)間;(2)證明:當(dāng)a≥1時(shí),ax2+3x-lnx>0.18.已知函數(shù)SKIPIF1<0,SKIPIF1<0(1)試討論SKIPIF1<0的單調(diào)性;(2)求證:SKIPIF1<0.19.已知函數(shù)SKIPIF1<0.(1)若SKIPIF1<0,求a的值;(2)證明:SKIPIF1<0.20.已知函數(shù)SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.(1)求SKIPIF1<0的最大值;(2)若對(duì)SKIPIF1<0,總存在SKIPIF1<0使得SKIPIF1<0成立,求SKIPIF1<0的取值范圍;(3)證明不等式SKIPIF1<0.21.已知SKIPIF1<0.(1)求證:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0;(2)求證:SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.22.已知函數(shù)SKIPIF1<0.(1)若SKIPIF1<0在區(qū)間SKIPIF1<0上單調(diào)遞增,求實(shí)數(shù)SKIPIF1<0的取值范圍;(2)求證:SKIPIF1<0且SKIPIF1<0.23.已知函數(shù)SKIPIF1<0,其中SKIPIF1<0,SKIPIF1<0.(1)討論函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0,SKIPIF1<0上的單調(diào)性;(2)求證:SKIPIF1<0.24.已知函數(shù)SKIPIF1<0(1)當(dāng)SKIPIF1<0時(shí),求SKIPIF1<0在SKIPIF1<0處的切線(xiàn)方程;(2)若SKIPIF1<0,求實(shí)數(shù)SKIPIF1<0取值的集合;(3)當(dāng)SKIPIF1<0時(shí),對(duì)任意SKIPIF1<0,令SKIPIF1<0,證明:SKIPIF1<0.25.已知函數(shù)SKIPIF1<0(SKIPIF1<0).(1)求函數(shù)SKIPIF1<0的單調(diào)區(qū)間;(2)若SKIPIF1<0在定義域內(nèi)恒成立,求實(shí)數(shù)SKIPIF1<0的取值范圍;(3)證明:SKIPIF1<0(SKIPIF1<0,SKIPIF1<0).26.已知函數(shù)SKIPIF1<0SKIPIF1<0.(1)討論函數(shù)SKIPIF1<0的單調(diào)性;(2)①若SKIPIF1<0,證明:SKIPIF1<0在SKIPIF1<0上恒成立;②證明:對(duì)任意正整數(shù)SKIPIF1<0SKIPIF1<0,都有SKIPIF1<0成立(其中SKIPIF1<0為自然對(duì)數(shù)的底數(shù)).27.已知函數(shù)SKIPIF1<0和SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),求方程SKIPIF1<0的實(shí)根;(2)若對(duì)任意的SKIPIF1<0,函數(shù)SKIPIF1<0的圖象總在函數(shù)SKIPIF1<0的圖象的上方,求實(shí)數(shù)SKIPIF1<0的取值范圍;(3)求證:SKIPIF1<0,SKIPIF1<0.28.已知函數(shù)SKIPIF1<0.(1)求函數(shù)SKIPIF1<0的單調(diào)區(qū)間及最值;(2)證明:SKIPIF1<0,SKIPIF1<0.29.已知函數(shù)SKIPIF1<0(1)若SKIPIF1<0對(duì)于SKIPIF1<0恒成立,求SKIPIF1<0的值;(2)求證:SKIPIF1<0.30.已知函數(shù)SKIPIF1<0.(1)求函數(shù)SKIPIF1<0圖象在SKIPIF1<0處的切線(xiàn)方程.(2)證明:SKIPIF1<0.31.已知函數(shù)SKIPIF1<0(SKIPIF1<0,且SKIPIF1<0).(1)討論函數(shù)SKIPIF1<0的單調(diào)性;(2)證明:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0.32.已知函數(shù)SKIPIF1<0(SKIPIF1<0)(其中SKIPIF1<0為自然對(duì)數(shù)的底數(shù)).(1)當(dāng)SKIPIF1<0時(shí),判斷函數(shù)SKIPIF1<0的單調(diào)性;(2)若SKIPIF1<0,證明SKIPIF1<0對(duì)于任意的SKIPIF1<0恒成立.33.設(shè)SKIPIF1<0,已知函數(shù)SKIPIF1<0在點(diǎn)SKIPIF1<0處的切線(xiàn)方程為SKIPIF1<0.(Ⅰ)求a,b的值;(Ⅱ)證明:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0.34.(1)已知函數(shù)SKIPIF1<0(SKIPIF1<0).①試討論函數(shù)SKIPIF1<0的單調(diào)性;②若SKIPIF1<0,SKIPIF1<0為函數(shù)SKIPIF1<0的兩個(gè)極值點(diǎn),證明:SKIPIF1<0.(2)證明:SKIPIF1<0(e為自然對(duì)數(shù)的底數(shù),SKIPIF1<0,SKIPIF1<0)35.已知函數(shù)SKIPIF1<0,SKIPIF1<0.(1)討論SKIPIF1<0在區(qū)間SKIPIF1<0上的零點(diǎn)個(gè)數(shù);(2)SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),存在SKIPIF1<0,SKIPIF1<0有SKIPIF1<0成立,證明:SKIPIF1<0.36.已知函數(shù)SKIPIF1<0.(1)判斷函數(shù)SKIPIF1<0的單調(diào)性;(2)設(shè)SKIPIF1<0,求證:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0.37.已知函數(shù)SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),求SKIPIF1<0的最小值;(2)若對(duì)任意SKIPIF1<0恒有不等式SKIPIF1<0成立,證明:SKIPIF1<0.38.已知函數(shù)SKIPIF1<0SKIPIF1<0,SKIPIF1<0為SKIPIF1<0的導(dǎo)數(shù).(1)若函數(shù)SKIPIF1<0有兩個(gè)極值點(diǎn),求實(shí)數(shù)a的取值范圍;(2)當(dāng)SKIPIF1<0時(shí),求證:SKIPIF1<0.39.已知函數(shù)SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),求曲線(xiàn)SKIPIF1<0在SKIPIF1<0處的切線(xiàn)方程.(2)證明:當(dāng)SKIPIF1<0時(shí),對(duì)一切SKIPIF1<0,都有SKIPIF1<0成立.40.已知函數(shù)SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),求SKIPIF1<0的單調(diào)區(qū)間;(2)當(dāng)SKIPIF1<0時(shí),若不等式SKIPIF1<0恒成立,求實(shí)數(shù)SKIPIF1<0的取值范圍;(3)若SKIPIF1<0,證明:SKIPIF1<0.41.已知函數(shù)SKIPIF1<0,SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),求函數(shù)SKIPIF1<0的單調(diào)區(qū)間;(2)證明:當(dāng)SKIPIF1<0,SKIPIF1<0恒成立.42.已知函數(shù)SKIPIF1<0(SKIPIF1<0).(1)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0;(2)若SKIPIF1<0有且僅有兩個(gè)零點(diǎn)SKIPIF1<0,SKIPIF1<0,求實(shí)數(shù)SKIPIF1<0的取值范圍,并證明SKIPIF1<0.43.已知函數(shù)SKIPIF1<0(1)求SKIPIF1<0的解析式及單調(diào)區(qū)間;(2)若SKIPIF1<0,求SKIPIF1<0的最大值;(3)證明:SKIPIF1<0.44.已知函數(shù)SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),求函數(shù)SKIPIF1<0的最小值;(2)討論函數(shù)SKIPIF1<0的單調(diào)性;(3)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0.45.已知SKIPIF1<0,其中SKIPIF1<0,且SKIPIF1<0.(1)求SKIPIF1<0與SKIPIF1<0的關(guān)系;(2)若SKIPIF1<0在其定義域內(nèi)為單調(diào)函數(shù),求SKIPIF1<0的取值范圍;(3)證明:①SKIPIF1<0;②SKIPIF1<0.46.已知函數(shù)SKIPIF1<0.(1)若函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0上單調(diào)遞增,求實(shí)數(shù)a的取值范圍;(2)證明:SKIPIF1<0(SKIPIF1<0,且SKIPIF1<0).47.已知函數(shù)SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),求曲線(xiàn)SKIPIF1<0在點(diǎn)SKIPIF1<0處的切線(xiàn)方程;(2)討論SKIPIF1<0的單調(diào)性;(3)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0.48.已知函數(shù)SKIPIF1<0,其中SKIPIF1<0.(1)討論SKIPIF1<0的單調(diào)性;(2)若SKIPIF1<0有兩個(gè)零點(diǎn),求SKIPIF1<0的取值范圍:(3)證明:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0恒成立.49.已知函數(shù)SKIPIF1<0.(1)若SKIPIF1<0恒成立,求實(shí)數(shù)SKIPIF1<0的取值范圍;(2)求證:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0成立.50.已知函數(shù)SKIPIF1<0.(1)討論函數(shù)SKIPIF1<0的單調(diào)性(2)設(shè)SKIPIF1<0,SKIPIF1<0時(shí),SKIPIF1<0,求整數(shù)k的最大值;(3)求證:SKIPIF1<0時(shí),SKIPIF1<0.51.已知函數(shù)SKIPIF1<0.(1)求函數(shù)SKIPIF1<0的單調(diào)區(qū)間;(2)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0.52.已知函數(shù)SKIPIF1<0(其中SKIPIF1<0為自然對(duì)數(shù)的底數(shù)).(1)當(dāng)SKIPIF1<0時(shí),求證:函數(shù)SKIPIF1<0圖象上任意一點(diǎn)處的切線(xiàn)斜率均大于SKIPIF1<0;(2)若SKIPIF1<0對(duì)于任意的SKIPIF1<0,SKIPIF1<0恒成立,求實(shí)數(shù)SKIPIF1<0的取值范圍.53.已知函數(shù)SKIPIF1<0,且函數(shù)SKIPIF1<0與SKIPIF1<0有相同的極值點(diǎn).(1)求實(shí)數(shù)SKIPIF1<0的值;(2)若對(duì)SKIPIF1<0,不等式SKIPIF1<0恒成立,求實(shí)數(shù)SKIPIF1<0的取值范圍;(3)求證:SKIPIF1<0.54.已知函數(shù)SKIPIF1<0.(1)若SKIPIF1<0存在極值,求SKIPIF1<0的取值范圍.(2)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0.55.已知函數(shù)SKIPIF1<0.(1)若SKIPIF1<0,且SKIPIF1<0,求SKIPIF1<0的值;(2)證明:SKIPIF1<0.56.設(shè)SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),求證:SKIPIF1<0;(2)證明:對(duì)一切正整數(shù)n,都有SKIPIF1<0.57.已知函數(shù)SKIPIF1<0(1)求SKIPIF1<0的單調(diào)區(qū)間;(2)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0.58.已知SKIPIF1<0(1)若SKIPIF1<0恒成立,求實(shí)數(shù)a的取值范圍;(2)求證:SKIPIF1<059.已知SKIPIF1<0,其中SKIPIF1<0.(1)討論函數(shù)SKIPIF1<0的單調(diào)性;(2)證明:SKIPIF1<0,其中SKIPIF1<0,SKIPIF1<0.60.已知函數(shù)SKIPIF1<0.(1)討論函數(shù)SKIPIF1<0的零點(diǎn)個(gè)數(shù);(2)證明:SKIPIF1<0.61.已知函數(shù)SKIPIF1<0,SKIPIF1<0.(1)已知SKIPIF1<0恒成立,求a的值;(2)若SKIPIF1<0,求證:SKIPIF1<0.62.已知SKIPIF1<0是函數(shù)SKIPIF1<0的極值點(diǎn).(1)求SKIPIF1<0的值,并證明SKIPIF1<0恒成立;(2)證明:對(duì)于任意正整數(shù)SKIPIF1<0,SKIPIF1<063.已知SKIPIF1<0(1)證明:SKIPIF1<0;(2)證明:SKIPIF1<0.64.已知函數(shù)SKIPIF1<0,SKIPIF1<0.(1)若函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0內(nèi)的單調(diào)遞增,求SKIPIF1<0的取值范圍;(2)證明:對(duì)任意SKIPIF1<0,SKIPIF1<0.65.已知SKIPIF1<0,其中SKIPIF1<0為自然對(duì)數(shù)的底數(shù).(1)當(dāng)SKIPIF1<0時(shí),求函數(shù)SKIPIF1<0在點(diǎn)SKIPIF1<0處的切線(xiàn)的方程;(2)當(dāng)SKIPIF1<0時(shí),求函數(shù)SKIPIF1<0在SKIPIF1<0上的最小值;(3)求證:SKIPIF1<0.66.已知函數(shù)SKIPIF1<0,SKIPIF1<0,且曲線(xiàn)SKIPIF1<0和SKIPIF1<0在原點(diǎn)處有相同的切線(xiàn).(1)求實(shí)數(shù)SKIPIF1<0的值,并證明:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0;(2)令SKIPIF1<0,且SKIPIF1<0,證明:SKIPIF1<0.67.已知SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí)求SKIPIF1<0的極值點(diǎn)個(gè)數(shù);(2)當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,求a的取值范圍;(3)求證:SKIPIF1<0,其中SKIPIF1<0.68.已知定義在SKIPIF1<0上的函數(shù)SKIPIF1<0.(其中常數(shù)SKIPIF1<0是自然對(duì)數(shù)的底數(shù),SKIPIF1<0)(1)當(dāng)SKIPIF1<0時(shí),求SKIPIF1<0的極值;(2)(i)若SKIPIF1<0在SKIPIF1<0上單調(diào)遞增,求實(shí)數(shù)SKIPIF1<0的取值范圍;(ii)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0.69.已知函數(shù)SKIPIF1<0.(1)討論函數(shù)SKIPIF1<0的單調(diào)性;(2)證明:對(duì)任意SKIPIF1<0,都有SKIPIF1<0.70.已知函數(shù)SKIPIF1<0.(1)若SKIPIF1<0在其定義域上為單調(diào)遞減函數(shù),求實(shí)數(shù)SKIPIF1<0的取值范圍;(2)設(shè)函數(shù)SKIPIF1<0.①若SKIPIF1<0在SKIPIF1<0上恰有1個(gè)零點(diǎn),求實(shí)數(shù)SKIPIF1<0的取值范圍;②證明:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0.71.已知函數(shù)SKIPIF1<0.(1)求SKIPIF1<0的極值;(2)當(dāng)SKIPIF1<0時(shí),若SKIPIF1<0,且SKIPIF1<0,求證:SKIPIF1<0.72.設(shè)函數(shù)SKIPIF1<0在點(diǎn)SKIPIF1<0處的切線(xiàn)為SKIPIF1<0.(1)求SKIPIF1<0,SKIPIF1<0的值,并證明:SKIPIF1<0;(2)若SKIPIF1<0,SKIPIF1<0,不等式SKIPIF1<0恒成立,求實(shí)數(shù)SKIPIF1<0的取值范圍.73.已知SKIPIF1<0.(1)求證:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0在SKIPIF1<0上單調(diào)遞增;(2)對(duì)于任意SKIPIF1<0,證明:SKIPIF1<0.74.已知函數(shù)SKIPIF1<0.(1)求SKIPIF1<0的單調(diào)區(qū)間和最值;(2)證明:對(duì)大于1的任意自然數(shù)n,都有SKIPIF1<0.75.已知函數(shù)SKIPIF1<0(1)若SKIPIF1<0是SKIPIF1<0的極值點(diǎn),求SKIPIF1<0的值,并討論SKIPIF1<0的單調(diào)性;(2)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<076.已知函數(shù)SKIPIF1<0.(1)討論SKIPIF1<0的單調(diào)性;(2)當(dāng)SKIPIF1<0時(shí),證明:SKIPIF1<0.77.已知函數(shù)SKIPIF1<0(1)若SKIPIF1<0時(shí),SKIPIF1<0恒成立,求SKIPIF1<0的取值范圍;(2)求證SKIPIF1<0且SKIPIF1<0;(3)當(dāng)SKIPIF1<0時(shí),方程SKIPIF1<0有兩個(gè)不相等的實(shí)數(shù)根SKIPIF1<0,求證SKIPIF1<078.已知函數(shù)SKIPIF1<0.(1)若SKIPIF1<0時(shí),SKIPIF1<0恒成立,求SKIPIF1<0的取值范圍;(2)求證:SKIPIF1<0(SKIPIF1<0且SKIPIF1<0);79.(1)若SKIPIF1<0,判斷函數(shù)SKIPIF1<0在區(qū)間SKIPIF1<0內(nèi)的單調(diào)性;(2)證明:對(duì)任意SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.80.已知函數(shù)SKIPIF1<0.(1)當(dāng)曲線(xiàn)SKIPIF1<0在SKIPIF1<0處的切線(xiàn)與直線(xiàn)SKIPIF1<0垂直時(shí),求實(shí)數(shù)a的值;(2)求函數(shù)SKIPIF1<0的單調(diào)區(qū)間.(3)求證:SKIPIF1<0.81.已知函數(shù)SKIPIF1<0在SKIPIF1<0處取得極值.(1)求實(shí)數(shù)SKIPIF1<0的值,并求函數(shù)SKIPIF1<0的單調(diào)區(qū)間;(2)證明:SKIPIF1<0.82.已知函數(shù)SKIPIF1<0,其中SKIPIF1<0為自然對(duì)數(shù)的底數(shù),函數(shù)SKIPIF1<0.(1)求SKIPIF1<0的最大值;(2)求證:SKIPIF1<0;(3)求證:SKIPIF1<0.83.已知函數(shù)SKIPIF1<0.(1)求SKIPIF1<0的單調(diào)區(qū)間和最值;(2)證明:對(duì)大于1的任意自然數(shù)n,都有SKIPIF1<0.84.已知函數(shù)SKIPIF1<0;(1)求曲線(xiàn)SKIPIF1<0在點(diǎn)SKIPIF1<0處的切線(xiàn)方程;(2)求證:SKIPIF1<0.85.已知函數(shù)SKIPIF1<0(1)證明:SKIPIF1<0在區(qū)間SKIPIF1<0存在唯一極小值點(diǎn);(2)證明:SKIPIF1<0.86.如果SKIPIF1<0是定義在區(qū)間D上的函數(shù),且同時(shí)滿(mǎn)足:①SKIPIF1<0;②SKIPIF1<0與SKIPIF1<0的單調(diào)性相同,則稱(chēng)函數(shù)SKIPIF1<0在區(qū)間D上是“鏈?zhǔn)胶瘮?shù)”.已知函數(shù)SKIPIF1<0,SKIPIF1<0.(1)判斷函數(shù)SKIPIF1<0與SKIPIF1<0在SKIPIF1<0上是否是“鏈?zhǔn)胶瘮?shù)”,并說(shuō)明理由;(2)求證:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0.87.已知函數(shù)SKIPIF1<0.(1)求函數(shù)SKIPIF1<0的最大值;(2)證明:SKIPIF1<0.88.已知函數(shù)SKIPIF1<0,求證:(1)函數(shù)SKIPIF1<0有且僅有一個(gè)零點(diǎn);(2)SKIPIF1<0.89.已知函數(shù)SKIPIF1<0,(1)若直線(xiàn)SKIPIF1<0與曲線(xiàn)SKIPIF1<0相切,求SKIPIF1<0的值.(2)當(dāng)SKIPIF1<0時(shí),求證:當(dāng)SKIPIF1<0時(shí),SKIPIF1<0恒成立.(參考數(shù)據(jù):SKIPIF1<0,SKIPIF1<0,SKIPIF1<0)90.已知函數(shù)SKIPIF1<0,SKIPIF1<0.(1)當(dāng)SKIPIF1<0時(shí),SKIPIF1<0恒成立,求實(shí)數(shù)SKIPIF1<0的取值范圍;(2)求證:SKIPIF1<0.91.已知函數(shù)SKIPIF1<0.(1)若SKIPIF1<0
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