调和平均数的实际意义举例

).(3),,..,,,,().,,20à,80à.,([6]).,,.,,.,,,.,,.,,,,,,.[1].,.,1993(2)[2]..,1995(3)[3].,,.,1994(8)[4]..,1996(1)[5].(ProblemSolving).,1995(6)[6].,.,1997217(226343)x1x2,1x=1x1+1x2,xx1x2.,.:AB,,v1,,v2,v1v2v.:ABs,söv1,söv2,:v=2ssv1+sv2,]1v=121v1+1v2,vv1v2.(m),x1x2,x1x2.möx1möx2,x=2mmx1+mx2,]1x=121x1+1x2,xx1x2.,R1R2,R1R=1R1+1R2,R,,,.,R1R2R3,R1R=1R1+1R2+1R3.7199710©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.