最新§45齐次线性方程组有非零解的条件及解的结构(精)教学讲义PPT.ppt

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1、§45齐次线性方程组有非零解的条件及解的结构(精)齐次线性方程组解的性质：说明：上述定理的证明过程实际上就是求解齐次线性方程组的步骤.解:用基础解系表达的所有解为n1.Hesaidsoftly,sittingbesideme.2.Shuddering,Ihandedtheknifetohim.3.Kneeling,hepulledmeclose.4.Withtearswellingupinhiseyes,herepliedinatremblingvoice.5.Withhiseyesbrimmingwithtears,hepartedw

2、ithus.6.Facingdifficulties,youaresupposedtocomeupwithsolutions.7.Theheadmasterdidn'tblameRigobutrestedhishandonRigo'sshoulder,whichmadehimamazed,(notknowingwhattodo.)8.Hefeltsonervousonthestagethathislegstrembledandhispalmssweated.Sonervousdidhefeltonthestage.....9.Thema

3、nwhowaswavinghishandwasmyfather.10.Whenapproachinghim,Icouldn'thelpburstingintotears.Finally,IhadtosaygoodbyetoSarawithwhomIspentthewholesummer.Herfiguredisappearedinmysightatlast................11.Ihadtoadmitthatmydisappointmentwasgrowingsteadily.12.Nothingwassadderthan

4、beingleftoutbyfamilyonChristmans.13.NosoonerhadIheardthelaughterfrommyyoungersonthanIfeltheart-broken.14.Overcomebydisappointmentandloneliness,IbecamefullyawarethatIshouldhavespentmoretimewithmyfamily.15.Allofasudden,asoftvoiceawokeme,“Dad,thankyouforcomingbacktostaywith

5、usonChristmasEve16.Hearingthis,Ijustfeltastrongsenseofshame.17.Whatafreezingcoldwintermorning!18.Outsidethewindow,snowflakeskeptfallingandwindiswhistlingcrazily.19.Justthen,mymom,wearinganexhaustedexpression,cameoutwithabeautifulbrandnewcoatandhandedtome.20.Itlookedsosof

6、tandwarmthatIcouldn'thelprunningmyfingersoverthewhitefurcollar.21.Allofasudden,IrealizedthatitwasMomwhoworkedatthesewingmachineallnighttomakeacoarforme.22.Withtearsofgratitudefillingmyeyes,Icouldn'twaittoputiton.