Cov txheej txheem:

Dab tsi yog teev nyob rau hauv lej thiab piv txwv?
Dab tsi yog teev nyob rau hauv lej thiab piv txwv?

Video: Dab tsi yog teev nyob rau hauv lej thiab piv txwv?

Video: Dab tsi yog teev nyob rau hauv lej thiab piv txwv?
Video: 5 Yam: Txhob pub muaj nyob hauv Tsev (Tsis Zoo) 2024, Kaum ib hlis
Anonim

Hauv lej , a teeb yog ib qho kev sau zoo ntawm cov khoom sib txawv, suav tias yog ib qho khoom hauv nws tus kheej. Rau piv txwv , tus lej 2, 4, thiab 6 yog cov khoom sib txawv thaum txiav txim siab sib cais, tab sis thaum lawv suav tias suav nrog lawv tsim ib leeg. teeb ntawm qhov loj peb, sau{2, 4, 6}.

Ib yam li ntawd, lub ntsiab lus ntawm kev teeb tsa hauv lej yog dab tsi?

A teev nyob rau hauv lej yog ib qho kev sau los ntawm cov khoom zoo thiab cov khoom sib txawv, suav tias yog ib qho khoom hauv nws tus kheej. Cov yam ntxwv tseem ceeb tshaj plaws yog tias a teeb "muaj" cov ntsiab lus, thiab qhov ntawd ob teeb yog sib npaug (ib qho thiab tib yam) ifand tsuas yog tias txhua lub ntsiab ntawm ib qho yog ib qho ntawm lwm tus.

Tom qab ntawd, lo lus nug yog, dab tsi yog teev nyob rau hauv lej 7? f) Cov teeb ntawm tag nrho cov lej uas nws tus nqi tsis sib npaug rau 7 . Teeb A, B, C thiab D yog txhais los ntawm: A = {2, 3, 4, 5, 6, 7 IB = {3, 5, 7 C = {3, 5, 7 , 20, 25, 30}

Kuj paub, dab tsi yog universal teev nyob rau hauv lej nrog piv txwv?

Rau piv txwv , xav txog tus lej ib tus lej 1 txog 9: Yog tias {1, 2, 3, 4, 5, 6, 7, 8, 9} yog peb qhov loj dua teeb , ces A thiab B yog ib feem ntawm qhov ntawd teeb . Lus txhais: A Universal Teeb yog cov teeb ntawm tag nrho cov ntsiab underconsideration, denoted los ntawm peev. Tag nrho lwm yam teeb cov ntaub ntawv ntawm cov universal teeb.

Dab tsi yog hom kev teeb tsa?

Hom teeb

  • Singleton teeb. Yog hais tias ib lub teeb muaj tsuas yog ib lub caij nws yog hu ua ib tug singleton teeb.
  • Finite Teeb. Ib txheej uas muaj tus naj npawb ntawm cov khoom, piv txwv li nyob rau hauv uas tus naj npawb lub caij yog finite yog hais tias yog ib tug finiteset.
  • Infinite teeb.
  • Sib npaug.
  • Null teeb / khoob teeb.
  • Subset.
  • Tsim nyog.
  • Kev teeb tsa tsis raug.

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