---------------------------------------------------------------最新資料推薦------------------------------------------------------21-成立與在問(wèn)題一1、單變量恒成立問(wèn)題的轉(zhuǎn)化：()afx對(duì)xD()afx；(afx對(duì)xD()afx2()afx對(duì)xD()afx；(afx對(duì)xD()afx3()afx

xD

()af

D；(ffxD

R在DC()fxaxD恰成立()()fxxDa=()fxa

xD

恰()()fxxDa=41）設(shè)函數(shù))()fgx對(duì)[]12,,xab恒()(xgx()[]()()[(,)fxxabgxab2）設(shè)函數(shù)(()fxgx、[]1,xa

[xcd()()1g()[]()()[(,)fxxabgxxcd5、雙1/7

1(()fxgx[xab,[xab使((xgx)[]()()[](,xxabgxxab)()fgx，xab[xd

()()1xgx()[])()[](,fxxabgxxcd）設(shè)函數(shù)(()fxg，對(duì)任意的[xab,[xab使((xgx)[]()()[](,xxabgxxab)()fgx，xab[]2,cd使(()1xgx()[])()[](,fxxabgxxcd）設(shè)函數(shù)(()fxg，對(duì)任意的[xab[xcd使()(xgx()[]()()](),,fxxbMgxxcdN

的值6存1)()fxg[xab[]2,xab()(xgx[]()()[(,fxabgxxab）設(shè)()()fgx、[xaxcd

((xgx()[]()()[](,fxxabgxxd

)()fg，[]1,xab[xab()()12fxgx()[]()()[](,fxxabgxxab)()

---------------------------------------------------------------最新資料推薦------------------------------------------------------fxgx，[]1,ab，存[xcd()()1xgx()[])()[](,fxxabgxxcd

1、單變量恒成立問(wèn)題的轉(zhuǎn)化：()()fxg

xD

x

()fx()gx2

上方；1)()fgx、,對(duì)任意的[,xxa())12fxgxD

(fx的圖象整體恒在()gx的圖象上方；)()fgx對(duì)[]1,xab及[xcd恒有((xgx[],xab

(fx的圖象整體高于[],xcd()gx31）()()fxgx[xab,[xab使()()12fxgx[],xab()g(fx2）)(fxgx，xab[]2,xcd使)()12fxx[]xcd

(gx的[]1,3/7

xab()f的()()fxx、，[]1,xab，存xcd使()()1xgx=[],xd()gx],xab

()fx的圖[],xcd

()gx的圖[],xab

()fx41）設(shè)函數(shù))()fxgx，[xab[]2,ab使()(xgx[],xa時(shí)()gx的()fx)()fgx，[xab，存[]2,cd()(xgx[],xcd()gx[],xab()fx圖象的最1、已知函數(shù)()22x=+，()agxx=，a0x（1[()()xgx

a的）對(duì)任意[]]121,22,4x()(xgx恒的2、已()afxx++，意

()10fx在

b的?。?）[[,xx((xg的3、)2fx=(xm=[x，存

---------------------------------------------------------------最新資料推薦------------------------------------------------------[x使)()12fxgx成的取值范42xxx=+，()22mxm=+()fx在1x=與=處都取得極值，若對(duì)任意在fxx，實(shí)數(shù)m

()()122lngx值5pp式212xpxpx+++x6(xea=+R上的()()gxfx=+是[]上（1）a的值；（2）若gxtt+在[]x

t7、當(dāng))x式240mx++m的8、2fxxkx=+1()fxkk的取值范圍。

9、R，kx

的10、x，使得不13xxaa++a的11、((2xxxa=

5/7

12、)()ln,1,fxaxxxe=且()fxa）若mne，明nmmn；（3）令gxxx=(xe(xe，)(xfx1、設(shè)a[xaa，都有2,yaalogaxy+=，這時(shí)的）A.(]1,22,+[2,3D.{}2,32、若任意滿足050xyxyy+

,xy，不((xyxy++恒的3式2sin10xa+a的4()4x

[]xa的最大值5(28fxxxc=(22440gxxxx=+）[]x()()fxx

c的?。?）存在[]x，()()fxgxc的?。?）對(duì)3,3x()gx的（4）存在[2,3,3x()1xgx

的6、(231,xxaxbabR=++.

---------------------------------------------------------------最新資料推薦------------------------------------------------------)fx單調(diào)區(qū)間和極值；（2[]1,2aa++()/fa

7、A、BCL三點(diǎn),,

足：(