教程综合介绍neng tz0 dm mathematics paper 3 discrete markscheme.pdfVIP

–4–N14/5/MATHL/HP3/ENG/TZ0/DM/M

3Nmarks

AwardNmarksforcorrectanswerswherethereisnoworking.

DonotawardamixtureofNandothermarks.

TheremaybefewerNmarksavailablethanthetotalofM,AandRmarks;thisisdeliberateasit

penalizescandidatesfornotfollowingtheinstructiontoshowtheirworking.

4Impliedmarks

Impliedmarksappearinbrackets,forexample,(M1),andcanonlybeawardedifcorrectworkisseenorif

impliedinsubsequentworking.

Normallythecorrectworkisseenorimpliedinthenextline.

Markswithoutbracketscanonlybeawardedforworkthatisseen.

5Followthroughmarks

Followthrough(FT)marksareawardedwhereanincorrectanswerfromonepartofaquestionisused

correctlyinsubsequentpart(s).ToawardFTmarks,theremustbeworkingpresentandnotjustafinal

answerbasedonanincorrectanswertoapreviouspart.

IfthequestionbecomesmuchsimplerbecauseofanerrorthenusediscretiontoawardfewerFTmarks.

Iftheerrorleadstoaninappropriatevalue(forexample,sin1.5),donotawardthemark(s)forthe

finalanswer(s).

Withinaquestionpart,onceanerrorismade,nofurtherdependentAmarkscanbeawarded,

butMmarksmaybeawardedifappropriate.

Exceptionstothisrulewillbeexplicitlynotedonthemarkscheme.

6Mis-read

Ifacandidateincorrectlycopiesinformationfromthequestion,thisisamis-read(MR).Acandidateshould

bepenalizedonlyonceforaparticularmis-read.Use