在mfc列表控件中实现动态操作数据库（implementing the dynamic operation database in the mfc list control）

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1、在mfc列表控件中实现动态操作数据库（ImplementingthedynamicoperationdatabaseintheMFClistcontrol）DotproductofmathematicalknowledgeWithnelementshaveafinitesetof2nsubsetisnonemptyset,with2N-1,2n-2hasanonemptysubset.SetinCu(A,B)=(CuA)U(CuB),tofillupandequal.CU(AUB)(C=uA)a(CuB),andthecompensationisequaltothecomplementof.

2、Theax2+bx+c<0solutionsetforthe{x

3、m

4、1/n

5、nxorxax2+bx+c>0,1/m>setforthe{x

6、Xorx<1/ncx2+bx+a>0ax2-bx+c<0}solution;solutionsetfor{x

7、-n0ofthesolutionsetforthe{x

8、-1/mXorx<-1/n}>.Theoriginalpropositionanditsconversenegativepr

9、opositionareequivalentpropositions.Theinversepropositionoftheoriginalpropositionisequivalenttothenegativepropositionoftheoriginalproposition.Functionisaspecialmapping,functionandmappingcanbeused:f:A=Brepresentation.AsaidthepreimageBsaid,like.Whenf:A=Brepresentsafunction,Arepresentsthedomain,andBisg

10、reaterthanorequaltoitsrange.Onlyonemappedfunctionhasinversefunction.Thetwofunctionsofreciprocalfunctionsf(x)andF-1(x)areabouty=xsymmetry,andtheoriginalfunctionsareconsistentwiththemonotonicityofinversefunctions,andallofthemaresingularfunctions.Theevenfunctionandtheperiodicfunctionhavenoinversefunct

11、ion.Iff(-x)=f(x),f(x)isanevenfunction,iff(-x)=-f(x),f(x)isanoddfunction;evenfunctionontheYaxisofsymmetryandmonotonicityofthesymmetryaxisonbothsidesoftheopposite;oddsymmetricabouttheorigin,andthewholethemonotonicityofthesamedomain.Viceversa。Joachimfunctionhassignificancein0,f(0)=0.Themonotonicityofa

12、functioncanbeobtainedbythedefinitionmethodandthederivativemethod.Thederivativefunctionofoddfunctionisoddfunction,andthederivativefunctionofoddfunctionisevenfunction.ForanyconstantT(T=0),inthefieldofdefinitions,therearef(x+T)=f(x),calledf(x)isaperiodicfunctionofT,andf(x+kT)=f(x),KZ,k=0.Themonotonici

13、tyofcompoundfunctionssatisfiestheprincipleof"increasinganddecreasing".Adomainisarangeofargumentsinafunction.Example:functionf(2x)domainis[-1,1],y=(flog2x)domainmethod:-1=x=1,1/2=2x=2,f(x)domainof[1/2,2],1/2