高中数学联赛模拟试题10套1

63616(5a2b2)5c2c20(a,b,c)A1B3C4D5221xyx=−xRx1Ax2Bx0x2Cx0Dx12−x23P(2,1)lxyABAOBOlAxy30Bx3y50C2xy50Dx2y404cos2x3sin2xa1[0,]2πxaA0a1B3a1Ca1D0a151,2,2,3,3,3,4,4,4,4,5,5,5,5,5,6,1000A42B45C48D5161,2,3,4,5a1,a2,a3,a4,a5a1a2a2a3a3a4a4a5A8B10C14D169541[x]x12[x2x]19x99x_____2a11an+12ann2an_____37992550_____4ABCA3πsinB513cosC_____5kθxx2(2k1)xk210sinθcosθθ_____6()2524n+nN_____20xyzxyz1x(12x)(13x)y(12y)(13y)z(12z)(13z)0201axx2(a2002)xa02axx3(a22a2)x2a22a020rT{(x,y)|xyRx2(y7)2r2}S{(x,y)|xyRθRcos2θxcosθy0}50abcRbacaczz2(ac)zb0()21abaczacb+−+=−(ac)24b050ABCABCACBDBCADBACDABACDPDQPQCPBQK1AKBC22ABCSAKAPAQBC=ABCSABC50nna1,a2,,ann14(1,2,3,,)21niiajnijj===++∑121niiaSi==+∑nKQPABCD1C2C3D4A5B6D118138−158738272n-1n22n333434531226−5{θ|θ2nππ2nπ2πnZ}61n7n13xyz===120xyz⎧==⎪⎨⎪=⎩120xzy⎧==⎪⎨⎪=⎩120yzz⎧==⎪⎨⎪=⎩1a01336193619602664400020402a31119rmax42()24i2acacbz−±−−−⋅=BCARARBQCPAKBCARPQT2ABCSBCARATAQAPAKAPAPKAKP()21121Sn=−++