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2018-2019145701A={0,1,2}B={1,0,1}AB=2f(x)=21x3y=f(x)(2,16)f(x)4(31)x39x5x2px+8=0Mx2qx+p=0NMN={1}p+q=6f(x)=x2+2x+37f(x)=12112xxxxf(f(3))=8a=log0.60.9b=ln0.9c=20.9abc9y=ax+1+1(a0a1)10f(x)=log2(3x+1)11log2x=7xx0(n,n+1)n=12f(x)Rf(2a)+f(4a)0a13x|x21|a=0a14f(x)=ax2+(2a+b)x+2(x)b=2f(x)2x+22x2+4x+2f(x)1f(x)=|2x+a|)a=6f(x)RxyRf(xy)=xf(y)+yf(x)f(x).()6901514U=RA={x|1x3}B={x|2x4}C={x|axa+1}a(1)ABA(UB)(2)BC=Ca1614(1)03log232312)12(82(2)50lg2lg)5(lg21714f(x)loga(3ax)(a0a1)(1)xf(x)a(2)af(x)1a1816y()t()yty(116)ta(a)(1)y()t()(2)0.251916f(x)=kaxa-x(a0a1)(1)k(2)a1f(x)(3)f(1)=38g(x)=a2x+a-2x2mf(x))2m2016f(x)=x2+mx4(1)mA(2)f(x)g(m)(3)h(x)=721212xxF(m)=BmmhAmmg),(),(B=RAmF(m)=aa2018-2019145701A={0,1,2}B={1,0,1}AB={1,0,1,2}2f(x)=21x)3y=f(x)(2,16)f(x)y=x44(31)x39xx325x2px+8=0Mx2qx+p=0NMN={1}p+q=196f(x)=x2+2x+3(1,+)7f(x)=12112xxxxf(f(3))=9138a=log0.60.9b=ln0.9c=20.9abcbac9y=ax+1+1(a0a1)(1,2)10f(x)=log2(3x+1)(0,+)11log2x=7xx0(n,n+1)n=412f(x)Rf(2a)+f(4a)0aa313x|x21|a=0a114f(x)=ax2+(2a+b)x+2(x)b=2f(x)2x+22x2+4x+2f(x)1f(x)=|2x+a|)a=6f(x)RxyRf(xy)=xf(y)+yf(x)f(x).()6901514U=RA={x|1x3}B={x|2x4}C={x|axa+1}a(1)ABA(UB)(2)BC=Ca(1)AB={x|2x3}UB={x|x2x4}A(UB)={x|x3x4}(2)BC=CCB2aa+142a31614(1)03log232312)12(82(2)50lg2lg)5(lg2(1)=(23)32(12)+3+1=92(2)=(lg5)2+lg2(lg25+lg2)=(lg5)2+2lg2lg5+(lg2)2=(lg2+lg5)2=11714f(x)loga(3ax)(a0a1)(1)xf(x)a(2)af(x)1a(1)xf(x)3ax0xa0a32a00a23a1(2)af(x)1f(1)=13a=aa=1.5f(x)log1.5(31.5x)x=2f(2)=log1.50a=1.5af(x)11816y()t()yty(116)ta(a)(1)y()t()(2)0.25(1)0t0.1y=kt(0.1,1)k=10(0.1,1)y(116)ta1=(116)0.1aa=0.1y=1.0)161(1.00101.0tttt(2)(116)t0.10.25t0.60.61916f(x)=kaxa-x(a0a1)(1)k(2)a1f(x)(3)f(1)=38g(x)=a2x+a-2x2mf(x))2m(1)f(x)=kaxa-xRf(x)=kaxa-x(a0a1)f(0)=k1=0k=1(2)f(x)=axa-xx1x2Rx1x2f(x1)f(x2)=(11xxaa)(22xxaa)=(21xxaa)+(1211xxaa)=(21xxaa)+2121xxxxaaaa=(21xxaa)(1+211xxaa)a1x1x2210xxaaf(x1)f(x2)0f(x1)f(x2)f(x)R(3)f(1)=381aa=38a=331aa0a1a=3g(x)=32x+3-2x2m(3x3-x)=(3x3-x)22m(3x3-x)+2(x1)3x3-x=t(t38)y=t22mt+2=(tm)2m2+2m38ymin=m2+2=2m=2m38ymin=(38)22m38+2=2m=1225m=1225