Cov txheej txheem:
- Puas kev txiav txim tseem ceeb hauv Cartesian cov khoom?
- Yuav ua li cas yog khub hauv Cartesian khoom?
- Cov khoom ntawm Cartesian yog dab tsi?
- Koj puas tuaj yeem ua Cartesian cov khoom nrog khoob?
Video: Puas xaj tseem ceeb hauv cov khoom cartesian?
2024 Tus sau: Taylor Jerome | [email protected]. Kawg hloov kho: 2024-01-11 19:12
Puas xaj teeb meem hauv Cartesian khoom? Yog, qhov kev txiav txim uas cov khoom sib npaug hauv cov khoom cartesian tseem ceebvim tias cov khoom cartesian tsis sib hloov. Ob txheej A thiab B yog li ntawd, cov khoom cartesian A × B yuav tsis sib npaug rau cov khoom cartesian B × A.
Puas kev txiav txim tseem ceeb hauv Cartesian cov khoom?
Kev txiav txim tseem ceeb. Yog tias A=B, ces tsis muaj tseeb tias A × B=B × A, txij li kev txiav txim hauv txhua khub tseem ceeb. Peb tuaj yeem nqa cov khoom cartesian ntau tshaj li ob teev, piv txwv li, A × B × C. Qhov no yog cov txheej txheem ntawm kev txiav txim triples (a, b, c), nyob rau hauv txhua txoj kev koj tuaj yeem tsim cov no.
Yuav ua li cas yog khub hauv Cartesian khoom?
Ib tug txiav txim txhais tau tias ob lub ntsiab yog muab los ntawm txhua lub teeb. Rau ob qhov tsis yog qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob.
Cov khoom ntawm Cartesian yog dab tsi?
Khoom ntawm Cartesian khoom
- Cov khoom Cartesian tsis yog-commutative: A × B ≠ B × A.
- Lub cardinality ntawm Cartesian khoom yog txhais raws li tus naj npawb ntawm cov ntsiab lus hauv A × B thiab yog sib npaug rau cov khoom ntawm cardinality ntawm ob pawg: |A × B|=|A||B|
- A × B={∅}, yog A={∅} lossis B={∅}
Koj puas tuaj yeem ua Cartesian cov khoom nrog khoob?
Cov Khoom Muag Cartesian yog qhov sib npaug ntawm ob pawg A thiab B, uas tsim cov khub xaj. Cov khoom Cartesian ntawm ib qho teeb nrog lub khoob khoob yuav ib txwm khoob vim tias lub teeb khoob tsis muaj cov ntsiab lus.
Pom zoo:
Puas tau xaj thiab cov npe tsis tau xaj tuaj koom ua ke?
Cov npe yuav kuj yuav ua zes thiab cov npe sib txawv tuaj yeem siv ua ke, xws li hauv cov piv txwv hauv qab no, uas yog cov npe txhais uas muaj cov npe tsis tau xaj (cov khoom xyaw) thiab Daim ntawv teev npe (tus txheej txheem): Cov khoom xyaw:
Puas yog qhov kev txiav txim ntawm cov khoom sib npaug hauv qhov kev txheeb xyuas qhov tseem ceeb?
Qhov kev txiav txim ntawm cov khoom muaj nyob hauv nested thiab universal quantifiers hauv nqe lus yog qhov tseem ceeb. ∎ Thaum twg muaj tseeb? P(x, y) muaj tseeb rau txhua khub x, y . Puas kev txiav txim tseem ceeb hauv nested quantifiers?
Thaum twg daim ntawv xaj xaj xaj xaj xaj xaj xaj xaj?
Ib qho kev txiav txim lag luam feem ntau yuav ua tiav at los yog ze ntawm qhov kev twv tam sim no (rau kev muag khoom) lossis nug (rau xaj xaj) nqi. Txawm li cas los xij, nws yog ib qho tseem ceeb rau cov tub ua lag luam yuav tsum nco ntsoov tias tus nqi lag luam kawg tsis tas yuav yog tus nqi ntawm kev lag luam xaj yuav raug tua .
Thaum twg cov khoom hauv kev thauj mus los suav nrog hauv tus neeg yuav khoom cov khoom muag?
Cov khoom hauv kev thauj mus los suav nrog hauv tus neeg yuav khoom cov khoom muag: Txhua lub sijhawm thaum caij tsheb npav. Thaum tus neeg yuav khoom yuav tsum them tus nqi thauj khoom. Thaum tus neeg muag khoom yuav tsum them tus nqi thauj khoom .
Vim li cas cov cim thiab cov qauv ntawm cov khoom tseem ceeb?
Qhov tseem ceeb ntawm cov cim thiab cov qauv: Cov cim thiab cov qauv ntawm cov khoom muab cov ntaub ntawv ntau yam xws li. Hom ntawm cov ntsiab lus muaj nyob rau hauv lub compound . E.g. (H 20 yog ua los ntawm ob lub ntsiab lus hydrogen thiab oxygen).