2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nyob rau hauv rooj plaub, ob lossis ntau qhov teeb tsa tau ua ke siv kev ua haujlwm ntawm cov teeb tsa, peb tuaj yeem pom cov cardinality siv cov qauv hauv qab no. Formula 1: n(A u B)=n(A) + n(B) - n(A n B)
Yuav ua li cas koj pom lub cardinality ntawm ib lub teeb?
Xav txog ib lub teeb A. Yog tias A tsuas muaj tus lej kawg nkaus xwb, nws cardinality tsuas yog tus naj npawb ntawm cov ntsiab lus hauv A. Piv txwv li, yog A={2, 4, 6, 8, 10}, ces |A|=5.
Cardinality ntawm lub teeb yog dab tsi?
Nyob rau hauv lej, lub cardinality ntawm ib txheej yog ib qho kev ntsuas ntawm "tus naj npawb ntawm cov ntsiab lus" ntawm lub teeb. Piv txwv li, lub teeb muaj 3 yam, thiab yog li ntawd. muaj ib tug cardinality ntawm 3.
Na kev sib tshuam B yog dab tsi?
=n(A) + n(B) – n(A ∩ B) Yooj yim, tus naj npawb ntawm cov ntsiab lus hauv lub union ntawm teeb A thiab B yog sib npaug rau sum ntawm cardinal tooj ntawm cov teev A thiab B, rho tawm ntawm lawv cov kev sib tshuam.
txoj cai cardinality yog dab tsi?
Cardinality yog tus suav thiab kom muaj nuj nqis xa mus rau kev nkag siab tias tus lej kawg siv los suav ib pawg khoom sawv cev rau pes tsawg tus hauv pawg. Ib tug menyuam kawm ntawv uas yuav tsum rov hais dua thaum nug tias muaj pes tsawg cov khoom qab zib nyob rau hauv cov txheej txheem uas lawv nyuam qhuav suav, yuav tsis to taub lub ntsiab cai cardinality.
Pom zoo:
Puas yog txhua lub teeb muaj ib lub cardinality?
Ib txheej hu ua suav tau yog tias nws yog qhov kawg lossis suav tsis kawg. Yeej, ib qho teeb meem tsis kawg yog suav tau yog tias nws cov ntsiab lus tuaj yeem teev nyob rau hauv ib qho kev sib koom ua ke thiab koom nrog. "Listable"
Ib qho ntawm cov hauv qab no yog cov piv txwv ntawm cov lus pom zoo rau huab cua?
Cov kws tshawb fawb tau paub txog ntau qhov kev tawm tswv yim zoo hauv kev nyab xeeb. Ib qho piv txwv yog melting ice. Vim tias cov dej khov muaj lub teeb-xim thiab muaj kev cuam tshuam, feem ntau ntawm cov hnub ci uas tsoo nws tau rov qab mus rau qhov chaw, uas txwv qhov kub ntawm qhov nws ua rau.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Dab tsi yog cov reactants thiab cov khoom ntawm cov tshuaj tiv thaiv rau pem hauv ntej (sab laug-rau-txoj cai)?
Dab tsi yog cov reactants thiab cov khoom ntawm cov tshuaj tiv thaiv rau pem hauv ntej (sab laug-rau-txoj cai)?Glucose thiab Fructose yog cov reactants. Sucrose thiab Dej yog cov khoom. Puas yog cov tshuaj tiv thaiv tom ntej yog cov tshuaj tiv thaiv condensation lossis cov tshuaj tiv thaiv hydrolysis?
Puas qhia cov roj teeb feem pua ntawm cov roj teeb?
Tsis muaj dab tsi! Tshwj tsis yog tias koj tab tom sim kuaj xyuas raws nraim li cas roj teeb lub neej muaj Snapchat qhib ntawm koj lub vijtsam rau tsib feeb ncaj yuav haus (cov lus teb yog ib feem pua ntawm tag nrho), tsis muaj txiaj ntsig nce rau tus lej tus nqi hla lub cim.
