Video: Nws txhais li cas thaum ib tug upside down?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Dab tsi yog upside down ? Upside down piav qhia txog qhov xwm txheej thaum koj yuav ib yam dab tsi ntawm credit thiab tam sim no tshuav nqi ntau dua li nws tsim nyog. Koj ua tau ua upside down ntawm koj lub tsev, tsheb, lossis txawm daim pib mus rau ib qho kev tshwm sim tseem ceeb.
Ntawm no, lub ntsiab lus ntawm upside down A yog dab tsi?
Cov rov qab - nqes A cim yog universal quantifier los ntawm predicate logic. Raws li lwm tus tau sau tseg, nws txhais tau tias hais tias cov lus lees paub tuav "rau txhua qhov xwm txheej" ntawm qhov muab hloov pauv (ntawm no, s).
Ib yam li ntawd, lub tsev upside down txhais li cas? Ib rov qab - nqes qiv nyiaj tsuas yog qiv nyiaj uas tus tswv tshuav ntau tshaj qhov tsev muaj nqis. Yog tias koj muaj peev xwm them taus cov nqi tsev txhua hli thiab tsis xav txav mus los, ua upside down tej zaum yuav tsis muaj kev cuam tshuam tam sim ntawd.
Yuav kom paub, lub ntsiab lus ntawm ∀ yog dab tsi?
∀ Lub cim no txhais tau tias rau txhua tus (los yog qee zaum, rau txhua tus). Piv txwv li, " ∀ squares D, D yog ib daim duab plaub ". ∃ Lub cim no txhais tau tias muaj. Lub cim / ∈ yog siv los qhia tias cov khoom tsis nyob hauv ib txheej. Piv txwv li, π / ∈ Z, √ 2 / ∈ Q (qhov thib ob yuav siv qee qhov kev xav los ua pov thawj).
Daim duab upside down txhais li cas?
Ib rov qab - daim duab yog a duab (los yog daim duab) tias, thaum twg rov qab , zoo tib yam los yog hloov mus rau hauv lub duab ntawm ib qho txawv.
Pom zoo:
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