Qhov kev sib tshuam yog dab tsi?
Qhov kev sib tshuam yog dab tsi?

Video: Qhov kev sib tshuam yog dab tsi?

Video: Qhov kev sib tshuam yog dab tsi?
Video: Qhov Kev Sib Txheeb Ntawm Vajtswv thiab phau Vajluskub Yog Dab Tsi? 2024, Kaum ib hlis
Anonim

Ntxiv : Cov ntxiv ntawm ib txheej A yog txheej ntawm tag nrho cov ntsiab lus nyob rau hauv universal teeb TSIS muaj nyob rau hauv A, denoted A. Kev sib tshuam : Cov kev sib tshuam ntawm ob teev A thiab B , txhais tau tias A∩ B , yog txheej ntawm tag nrho cov ntsiab lus pom nyob rau hauv ob qho tib si A THIAB B.

Ib yam li ntawd, nws nug, ∩ txhais li cas?

Kev txhais ntawm Kev sib tshuam ntawm Sets: Kev sib tshuam ntawm ob qhov muab teev yog qhov loj tshaj plaws uas muaj tag nrho cov ntsiab lus uas muaj rau ob qho tib si. Lub cim rau denoting kev sib tshuam ntawm sets yog ' ∩ '.

Tsis tas li ntawd, qhov ∩ B txhais li cas? Hauv lej, the kev sib tshuam ntawm ob teev A thiab B , denoted los ntawm A ∩ IB , yog cov teeb muaj tag nrho cov ntsiab lus ntawm A uas kuj yog rau B (los yog sib npaug, tag nrho cov ntsiab lus ntawm B uas kuj yog A), thiab tsis muaj dab tsi ntxiv.

Tom qab ntawd, tus qauv rau kev sib tshuam B yog dab tsi?

Nyob rau hauv lej notation, the kev sib tshuam ntawm A thiab B yog sau liA∩ B = {x:x∈A A ∩ B = { x: x ∈ A and x∈ B } x ∈ B }. Piv txwv li, yog A = {1, 3, 5, 7} A = { 1, 3, 5, 7 } thiab B ={1, 2, 4, 6} B = {1, 2, 4, 6 }, then A∩ B ={1} A ∩ B = { 1 } vim 1 yog tib lub ntsiab lus uas tshwm nyob rau hauv ob lub teeb A thiab B.

Qhov sib ntxiv ntawm A thiab B yog dab tsi?

Tus txheeb ze ntxiv ntawm A hauv B yog denoted B ∖ A raws li ISO 31-11 tus qauv. Nws yog qee zaum sau B - A, tab sis qhov kev sau no tsis meej, raws li nyob rau hauv qee qhov ntsiab lus nws tuaj yeem txhais tau raws li cov txheej txheem ntawm tag nrho cov ntsiab lus b -a, qhov twg b yog muab los ntawm B thiab los ntawm A.

Pom zoo: