InternationalGeneralofSecondaryMARKSCHEMEfortheMay/June2011questionpaperfortheguidanceofteachersThismarkschemeispublishedasanaidtoteachersandcandidates,toindicatetherequirementsoftheexamination.ItshowsthebasisonwhichExaminerswereinstructedtoawardmarks.ItdoesnotindicatethedetailsofthediscussionsthattookceatanExaminers’meetingbeforemarkingbegan,whichwouldhaveconsideredtheacceptabilityofalternativeanswers.Markschemesmustbereadinconjunctionwiththequestionpapersandthereportonthe CambridgeispublishingthemarkschemesfortheMay/June2011questionpapersformostIGCSE,GCEAdvancedLevelandAdvancedSubsidiaryLevelsyllabusesandsomeOrdinaryLevelsyllabuses.PageMarkScheme:Teachers’IGCSE–May/June correctsolution followthroughaftererror ignoresubsequentworking orequivalent withoutwrongPart1121,32B1for3and164(a)1(b)5.515(a)1(b)8.64623 73 B1for12,5 M1for(their12)+(theirorM2√[(–8–4)2+(1–6)2]orM1if√83 M1for(r=)1260 oeM1for oftheirr3seenor922.53B2180=5x+2x+xoeorB1for2xor6xmarkedinthecorrectceonthex=y=3M1forconsistentmultiplicationandA1forx=13orA1fory=-(a)2M1for23.25and19.65(b)456.86251(a)(0)8(.)011Not(b)78.4or78.38to3M2for827orM1forfigs827÷their(a)2M1 orSC1forfigs54inSC1forfigs161orM12002or200002(b)2PageMarkScheme:Teachers’IGCSE–May/June caowith4B1for 4(2)(6)orbetterseenanywhereB1forp=–3andr=2×2orbet slongasintheformp+ qorp AfterB0B0,SC1for–2.6orand1.1or4 36oe( 36,0.306or0.3055815oe1111 k= (4π)or2(423k2 πkE1A=k4correctlycompletedto4A=4k2–M1factorising(mustcontainaπ)M1division(bycoefficientofk2)M1squareroot(a)2M1for90°clearlyidentifiedas(b)1(c)2B1forOBAorOAB= -r+qorq–( ?(3q–r)11Mustbe3M1forMX=?r+?their(–r+M1usingadifferentrouteforXSor?E1depcorrectsimplificationand1(b)3M1forattemptatareaunderM1for0.5×15×(their(a)+14×60)or0.5×15×(8+14)1(c)0.125or2M1fornumericalvertical/horizontalornumericaluseofv=u+atbutt≤120ort≤2 3( 8x4x+2113M1for(2x–3)3=125M12x–3=2M1forx±3=2yorx=y±220115/605800580/212（擴展）IGCSE、GCE2011月/62IGCSE20115/60580caocsodepftiswoeSCwww，Qu1.8471,482B1316(a)10(b)5.5OE1(a)86400b8.64104111082..311M133273133B112，5M1（12）2（5）2M2–8(16)2]oeM1（6.7033M1r31260oe4πM13r322.5oe3B21805x2xxoeB1（2x6x）x13y–93M1A1x13A1y(a)85.8(b)456.8625cao21M123.2519.65(a)0)8(.)01(am)(b)78.478.3878.39138.01M2827M1827(a)0.54(b)1.61222.7×20000M1oe100000SC154161M12002200002201120113IGCSE20115/60580–2.641.14cao42B13.()426B1p3和r=2×2或更好，只要在p+qp。q形式orrr在B0B0、SC1之后，表示–2.62.637(45…)1.115（一）412(bOE0.3333611(),0.306或0.3055至360.30568(c)0.533(3…)1516(a)4AA(b)k2(4.π(4π232.kM1(A=)k2π222πkE1Ak424A4k2πkM1（π）M1（k2）M117(a)66°(b)33°(c)123°212M1（90°）明確標識為AB1（OBAOAB18(a)(i)-r+qqr .(3qroe1bMX3M1rrq)M1用不同的XS或