f(x((與y=f(g(x((”型無(wú)參數(shù)型 f(x((與y=f(g(x((”解析式含參型 f(x((與y=f(g(x((”零點(diǎn)方程含參型 f(x((與y=f(g(x((”型無(wú)參數(shù)型r|3x-3|,x≥0+2x+2,x<0，則函數(shù)g(x(=f(f(xr|3x-3|,x≥0A.5B.6C.7D.8rxrxf(f(x(-2(=2實(shí)數(shù)根的個(gè)數(shù)為()-1,<2，則函數(shù)y=f(f(x((-的零點(diǎn)個(gè)數(shù)為.f(x((與y=f(g(x((”解析式含參型5.已知函數(shù)f(x(=A.a>1B.a<0C.-1<a<0D.a<-1x≤0x>0,若函數(shù)y=f(af(x((所有零點(diǎn)的乘積為1，則實(shí)數(shù)a的取值 . 7.已知函數(shù)f(x(= x≤0x>0f(x((與y=f(g(x((”零點(diǎn)方程含參型A.a<-1B.-1<a<0C.0<a<1D.a>1f(x(= C.h(x(可能有6個(gè)零點(diǎn)值范圍.14.(多選)若f(x(和g(x(都是R上的函數(shù)，且方程f[g(x([=x有實(shí)數(shù)解，則g[f(x([的解析式可能是()A.g[f(x([=x2+x-B.g[f(x([=x2+x+C.g[f(x([=x2-D.g[f(x([=x2+15.(多選)若f(x(和g(x(都是R上的函數(shù)，且f[g(x([=x有實(shí)數(shù)解，則g[f(x([可能是()16.已知函數(shù)f(x(=F(x(=f[f(x([+f(x(-2的零點(diǎn)個(gè)數(shù)是()A.4B.3C.2D.1x,x≤017.已知函數(shù)f(x(=lnx,x>0，g(x(=|x(x-2(|，則f(g(2((=，若方程f(g(x((+g(x(-m=018.已知函數(shù)f(x若方程f(x(=m有三個(gè)不等的實(shí)根，則實(shí)數(shù)m的取值范圍是 ；函數(shù)g(x(=f(f(x((-2f(x(-的零點(diǎn)個(gè)數(shù)是.-3,方程f(g(x((=-3-g(x(有兩個(gè)不同的根，分別是x1,x2,則A.0B.3C.6D.9(x2-4x+3,x≤0x>0f(x(([2-21.已知函數(shù)f(x(=x>2(a>0且a≠1)在R上為單調(diào)函數(shù).若方程f2(x(-4|f(x(|+3=A.(0,B.,C.f(x)]2=2af(x)-a2+3有且僅有5個(gè)不23.已知函數(shù)f(x(=x≥3x<3(1)判斷并用定義證明f(x)在(-∞,3)上的單調(diào)性；A.(-2,2)B.(3,2)C.(-2,-3)D.(2,+∞)f2(x(+af(x(-b2<0恰有一26.設(shè)函數(shù)f(x(= 27.已知函數(shù)f(x(若函數(shù)g(x(=f(x(-x-2m-1在區(qū)間[-2,4[內(nèi)有3個(gè)零點(diǎn)，|-<m≤-r{(C.{m或m=0}D.{m|-<m<或m=1}28.定義在R上的函數(shù)f(x(滿足f(x+2(=2f(x(，且當(dāng)x∈[0,2(時(shí)，f(x(=x(2-x(，則函數(shù)y=f(x(-在(-4,4(上的零點(diǎn)個(gè)數(shù)為()A.5B.6C.7D.8f(x(=x+a在區(qū)間[-2,4[有三個(gè)不等實(shí)根，實(shí)數(shù)a的30.定義在R上的函數(shù)f(x(滿足f(x+1(=2f(x(，且當(dāng)x∈[0,1[時(shí)，f(x(=(-∞,t[，都有f(x(≤2，則t的取值范圍是．A.B.C.D.的身影，則函數(shù)g(x(=x2-2[x[-3的零點(diǎn)有個(gè).函數(shù)f(x(=x-[x[,(x∈[-2,4[(，若函數(shù)y=f(x))A.3B.4C.5D.6于函數(shù)g(x(的敘述中正確的是()C.g(x(在R上為增函數(shù)D.函數(shù)g(x(在區(qū)間[-6,6[有12個(gè)零點(diǎn) 5.已知函數(shù)f(x，若函數(shù)y=f[f(x(-a[有3個(gè)零點(diǎn)，則實(shí)數(shù)a的取值范圍為 A.5B.4C.3D.2f2(x(+(1-6a(.f(x(-3a=0有4個(gè)不同A.-B.-C.-D.-A.,1B.[0,1[C.,1D.0, >0,若函數(shù)g(x(=[f(x([2-2(m+1(.f(x(+4m恰有5個(gè)零點(diǎn)，則實(shí)數(shù)mA.(0,1[B.(0,C.(0,D.(0,1(10.已知函數(shù)f(x(={((x|,，若函數(shù)g(x(=[f(x([2-2(m+2(f(x(+4m恰有5個(gè)零點(diǎn)，則實(shí)數(shù)mA.(0,1[B.(0,C.[1,+∞(D.創(chuàng)新提升11.(多選)設(shè)x∈R，用[x[表示不超過(guò)x的最大整數(shù)，例如，[-3.5[=-4,[2.1[=2．已知函數(shù)f(x(=x-A.f(-x(=f(x(B.f(x(=f(x+1(C.當(dāng)x∈(0,1(時(shí)，f(x(+f(-x(=1D.方程f(x(-|lgx|=0在實(shí)數(shù)范圍內(nèi)有9個(gè)不同的實(shí)數(shù)根(-x2+4x-2,x>0,13.(多選)已知函數(shù)f(x(={(2-x,x≤0,函數(shù)g(x(=[f(x([2