高考数学选择题的解题技巧（solving skills of mathematics selective questions in college entrance examination）

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1、高考数学选择题的解题技巧（Solvingskillsofmathematicsselectivequestionsincollegeentranceexamination）Icarefullycollateddocuments,documentsfromthenetworkIonlycollectandsortoutIfthereisanymistakePleasecheckityourself!Solvingskillsofmathematicsselectivequestionsincollege

2、entranceexaminationAccurateandrapidAccuracyisaprerequisiteforansweringmultiple-choicequestionsOnesteperrorCausewrongselectionTheproblemhasnopoints.Itshouldbecarefullycarefully,in-depthanalysis,correctdeduction,bewareofomissions;primaryaftercarefulinspec

3、tionEnsureaccuracyFastisthenecessaryconditiontowinthetimeandgethighmarksThe"timeoutpoints"(alsocalled"invisiblepoints")isamajorfactorcausinglowscoresforthemultiple-choiceanswertime.Shouldbecontrolledinlessthan40minutesorsoThefaster,thebetterThecollegeen

4、tranceexaminationrequiresthateachmultiple-choicequestionbesolvedwithin1~3minutes1.Directmethod:ProceeddirectlyfromtheconditionofsettingquestionsTheuseofrelevantconcepts,properties,theorems,lawsandformulasandotherknowledgeThroughrigorousreasoningandaccur

5、atecalculationSoastodrawacorrectconclusionChoosethe"seats"andthencontrolthetopicsgivenaccordingly.Thetopiccommonlyuseddirectmethodrelatestotheconceptandnatureofdiscriminationorsimpleoperation[case3](1996collegeentranceexamination)f(x)is(-infinity)Singul

6、arfunctionsF(X2)=F(x)Whenx=0~1F(x)=xThenf(7.5)isequalto...(A)0.5(B)0.5(C)1.5(D)1.52,specialcasemethod:Usingcommonvalues(specialfigures,specialpositions)insteadofquestionstosetupgeneralconditionsDrawspecialconclusionsTesteachoptionThecommoncaseshavespeci

7、alvalue,specialsequence,specialfunction,specialfigure,specialangle,specialpositionandsoon[case7](2000collegeentranceexamination)P=Q=R=Then()(A)RPQ(B)PQR(C)QPR(D)PRQTopicreview:setupThat'sequalto()(A)(B)(C)(D)3.Screeningmethod:Startingfromthesettingcondi

8、tionsUsetheorem,propertyandformulatodeduceAccordingtotheinstructionof"fourchoicesone"StepbystepeliminationofinterferencetermsSoastogetthecorrectjudgment[case8](2003)BeijingsetA={}).Equalto()(A)(B)(C)(D)Thinkingtraining:1,ifthesol