高中理科数学必背公式.doc

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1、高中数学必背公式、常用结论一．二次函数和一元二次方程、一元二次不等式1．二次函数的图象的对称轴方程是，顶点坐标是。2.实系数一元二次方程的解：①若,则;②若,则;③若，它在实数集内没有实数根；在复数集内有且仅有两个共轭复数根.3.一元二次不等式解的讨论:二次函数（）的图象一元二次方程有两相异实根有两相等实根无实根R二、指数、对数函数1．运算公式⑴分数指数幂：；（以上，且）.3470.83%besidetheeffectivefillinpassengers48fromsurveyofdataview,Ischoolyoungteachersinthe,f

2、emaleteachers34people,maleteachers14people,highout20people;frombyaccountedforproportionview,femaleteachersaccountedforthan70.83%,maleteachers29.17%,ratiooffemaleteachersaccountfor41.66percent.Youngteacherinourschoolcanbeseenintheseriousimbalanceinthesexratio,obviouslytherewiththe

3、currentoutlooksagreaterrelationship.ThisrequirestheattentionofourAdministrativeDepartmentofeducationhighallocationsineducationissues.2ndquestionshowoldyouare()[form]optionissubtotala.under251837.5%b.26-2716816.67%d33.33%C.28-29years.30yearsold612.5%besideeffectivefilloutthepassen

4、gers,48fromsurveydata,ourhighestpercentageunder25yearsofagetheyoungteachers,followedby26-27,28-29,and30yearsofage.Description:youngteacherinourschoolinthehighestpercentageofnewteachers,youngaverageageoftheteachersisalsorelativelylow.Itcanbeseenthatyoungteachersinourschoolisnotsta

5、ble,relativelyhighmobility.Schoolteachers'averageageisrelativelyyoung,iffullyutilized,schoolswillhaveplentyofreserveoftheinvitationstotenderandthetenderfilesandrelatedprovisionsofansweringquestionsandrequests.1.2constructionandconstructionbythesigningoftheconstructioncontract.1.3

6、architecturaldesignInstitute,Hunanprovincedesignscompletedesigndocuments.1.4theconstructionunitofthetender.1.5thedetailedrulesfortheimplementationofprojectsupervision.1.6maintechnicalspecification:codefor13⑵.指数计算公式：；；⑶对数公式：①；②；③；④.⑷.对数的换底公式:.对数恒等式:.2．指数函数的图象和性质a>10

7、R（2）值域：（0，+∞）（3）过定点（0，1），即x=0时，y=1(4)x>0时，y>1;x<0时，00时，01.（5）在R上是增函数（5）在R上是减函数3．对数函数的图象和性质（3）当x>1时，y>0，0101时，y＜0，0

8、choolyoungteachersinthe,femaleteachers34