高中数学联赛模拟试题10套7

6361abcacbcA1B2C3D2f(x)Rg(x)Rf(x)−g(x)=x2+2x+3f(x)+g(x)=A−x2+2x−3Bx2+2x−3C−x2−2x+3Dx2−2x+33ABCOABCAOB=BOC=COA=23πAB+BC+CAm(AO+BO+CO)mA2B53C3D324x=0.820.5y=sin1z=log37xyzAxyzByzxCzxyDzyx519959510[]103+A10B01C00D206(a,b)ab(a,b)=1(a2+b2,a3+b3)A1B2C12D29541f(x)=x10+2x9−2x8−2x7+x6+3x2+6x+1f(2−1)=_____2F1F2x2−y2=4PF1F1PF2MM_____3{xn}x1=11313nnnxxx++=−x1999−x601=_____4ABCD−A1B1C1D11ECDFBB1AD1EF_____5123yxyx⎧≥−−⎪⎨≤−+⎪⎩_____6124_____2022221xyab+=A(1,0)x|y|=xBCABCM(m,0)e2213em20abcabbcca32222abcbcacababbcca+−++−++−−+−+−220f(x)=ax4+bx3+cx2+dxiabcd0iix{−2,−1,0,1,2}f(x)iiif(1)=1,f(5)=70xf(x)50KABCC1B1ABACACC1KB2ABB1KC2AB2C2ABCCAB50cosisin55wππ=+f(x)=(x−w)(x−w3)(x−w7)(x−w9)f(x)f(x)50211201D2A3C4B5C6C142x2+y2=43045245166532(1,)4+60100