Vim li cas kev sib tshuam khoob teeb?

Cov txheej txheem:

Vim li cas kev sib tshuam khoob teeb?
Vim li cas kev sib tshuam khoob teeb?

Video: Vim li cas kev sib tshuam khoob teeb?

Video: Vim li cas kev sib tshuam khoob teeb?
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Anonim

Yog tias tsis muaj cov ntsiab lus tsawg kawg yog ib qho ntawm peb tab tom sim nrhiav kev sib tshuam ntawm, ces ob lub teeb tsis muaj cov ntsiab lus sib xws. Hauv lwm lo lus, kev sib tshuam ntawm ib qho teeb meem nrog lub khoob khoob yuav muab rau peb qhov khoob. Qhov kev qhia no yuav ua rau muaj kev sib haum xeeb nrog kev siv peb cov cim.

Kev sib tshuam ntawm qhov khoob khoob nrog nws tus kheej yog dab tsi?

Txoj kev sib tshuam ntawm txhua qhov teeb tsa nrog lub khoob khoob yog nws tus kheej lub teeb khoob: S∩∅=∅

Koj ua pov thawj li cas kev sib tshuam yog khoob?

A∩∅=∅ vim, vim tsis muaj cov ntsiab lus hauv lub teeb khoob, tsis muaj cov ntsiab lus hauv A kuj nyob rau hauv qhov khoob, yog li kev sib tshuam yog khoob.. Li no qhov kev sib tshuam ntawm ib qho teeb thiab ib qho khoob khoob yog ib qho khoob.

Dab tsi yog kev sib tshuam ntawm cov teeb tsa tsis muaj?

Rau txhua qhov teeb tsa A, qhov kev sib tshuam ntawm A nrog cov txheej txheem null yog the null set. Tsuas yog subset ntawm null teeb yog qhov null teeb nws tus kheej. Lub cardinality ntawm lub null teeb yog 0.

Yuav ua li cas thaum koj hla ib txheej nrog lub khoob khoob?

Txoj kev sib tshuam ntawm ib qho teeb meem nrog khoob teeb yuav ib txwm yog qhov khoob. Txij li thaum lub khoob khoob tsis muaj cov ntsiab lus ntawm tag nrho, yuav tsis muaj cov ntsiab lus ntawm qhov khoob thiab qhov tsis muaj qhov khoob.

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