～學(xué)年高一第一學(xué)期期中考試(．A=x|x2，B=xx?10AB=（▲）．x?2x1．xx?2．下列函數(shù)中，在區(qū)間(0,+)▲）y=3xyx21．12,．．y=2?xy=x3+x1x≥則x?1+x8．x0(2bx0▲）1111()2222=cbcc．()x(mxmxx(0)2m42．x2▲．Rxx(x)(0xa▲）((311222．()與)▲）1x21x(xx()10xx2e?1x)▲）e+1x1x)＝x2()()xxxx1212?122若xy0xxy若0x+1xxx23▲．xm()212▲．14+▲．．?Naba2▲，▲．2362()lg52+lg2lg50++5；1()fxx()=x2+mx?2m()．m()?,2mx?1,1()0m()|xA,x－．AB－，－；)(AABBA()()＝x|x+ax?2a≥0P()ax2（2143()5x?3x{xb(2－)－．AB；A，1；abBAxB是，xab()()()a=a?a,aa1．x()fxm2,+)mkmk4～學(xué)年高一第一學(xué)期期中考試(．A=x|x2，B=xx?10AB=（▲）．x?2x1．xx?2．下列函數(shù)中，在區(qū)間(0,+)▲）y=3xyx2．y=2?x1．．．+x1f(f(0))=（▲）則58C．x0(2bx0▲）1111()2222A，b0.80.9，=bcC．()x(mxmxx(0)22m▲）242A．x2▲5▲）a((12()＝x1()＝x2·(xx()1Dx＝0x2x)▲）x1()＝2()()fx?fx1212?12▲）若1x+≥2若xy0xy若0x+1xxx456N|+03▲．xx2mxm21214+，＋xyxy．?Naba212+=ab2=，3lg5；21)=x+x()fxx(=25=10．log5+log52211)=x+x=(x+?1，xx11x+xxx1x()＝2)．x=x2+mx?2m()．m7()?,2fxm?1,1fx()0xm()?2?,2xmxm()3分2m2x?()m1,1()1分m)，xAB|xA,且x－．AB()＝?1,1－，－；)(AABBA()()1,2＝xP－4分BA－6分QPQPaPQPa0Pxxaxa1分a，xa≤，a1a2()8ax2（21？411則(1－)＝－)＝3分axa()110－xn22a則n(1－).xn1令xa(1－)≤(1－)≤9分xnnn3，≥分n1032≤n分()5x?3；AabB，xab2或，xxA2xb2axa(6分x1xa2911Ba2x9分AB由2－)－0(－)，xbbaxbAB2Bb1aB22ABaa1b0(－)0(＋－)．a(chǎn)xbx1b{＋－)．Ba1b＜，ABa21a3b1，≤－4＜6xaba3b分()()()a=．x()fxm2,+)mkmkR．x()f?x=()axa2a0＝是R＝是Ryayaxx－a＝－是Ryaaxx－a=xa0＜1a10xxa=是R是R8分xxxx12121a?=x2fxfx1xx1212a22xx21=xx12a1a12a2()a=是Rfxfxfxfx121210，又1+?a1a2a12a2()a(－(()＜()fx=a?a是Rfxfxfxfxx1212()=a?a是R8分fxxa2，1)()，fffx()fxmkm，=2+x．gmgmkkk2??當(dāng)gm2即k4()＝(，g224k．k?當(dāng)2即k4()＝2k，gmg25＜k－．25k分21111Ba2x9分AB由2－)－0(－)，xbbaxbAB2Bb1aB22ABaa1b0(－)0(＋－)．a(chǎn)xbx1b{＋－)．Ba1b＜，ABa21a3b1，≤－4＜6xaba3b分()()()a=．x()fxm2,+)mkmkR．x()f?x=()axa2a0＝是R＝是Ryayaxx－a＝－是Ryaaxx－a=xa0＜1a10xxa=是R是R8分xxxx12121a?=x2fxfx1xx1212a22xx21=xx12a1a12a2()a=是Rfxfxfxfx121210，又1+?a1a2a12a2()a(－(()＜()fx=a?a是Rfxfxfxfxx1212()