Kev sib tshuam ntawm Teeb yog dab tsi? Nyob rau hauv txoj kev xav, rau ob pawg A thiab B, qhov kev sib tshuam txhais tau tias yog txheej ntawm tag nrho cov ntsiab lus hauv teeb A uas tseem muaj nyob hauv teeb B. Peb siv lub cim '∩' uas txhais tau tias 'kev sib tshuam ntawm'.
Koj pom qhov kev sib tshuam ntawm ob pawg li cas?
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. Txhawm rau nrhiav qhov kev sib tshuam ntawm ob pawg A thiab B yog cov txheej txheem uas muaj tag nrho cov ntsiab lus uas muaj rau ob qho tib si A thiab B. Lub cim rau denoting kev sib tshuam ntawm cov teev yog '∩'.
Kev sib tshuam ntawm ob lub teeb yog dab tsi?
Kev sib tshuam ntawm ob lub teeb yog txheej txheem uas nyob hauv thawj txheej thiab thib ob txheej.
∩ txhais li cas hauv lej?
∩ Lub cim ∩ txhais tau tias kev sib tshuam. Muab ob pawg S thiab T, S ∩ T yog siv los qhia txog cov teeb {x|x ∈ S thiab x ∈ T}. Piv txwv li {1, 2, 3}∩{3, 4, 5}={3}. / Lub cim / txhais tau tias tshem tawm ntawm lub teeb.
Kev sib tshuam ntawm kev teeb tsa rau nws tus kheej yog dab tsi?
Kev sib tshuam ntawm lub teeb nrog nws tus kheej yog qhov teeb tsa nws tus kheej. Qhov no yog vim kev sib tshuam yog ib txheej ntawm cov ntsiab lus. Ntawm no, tag nrho cov ntsiab lus ntawm lub teeb yog ib txwm nrog nws tus kheej. Qhov kev sib tshuam tshwm sim, yog li, tau teeb tsa nws tus kheej.
