Qhov txawv ntawm inverse thiab negation yog dab tsi?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Yog ib nqe lus thim rov qab yog muaj tseeb, ces nws converse yog tseeb (thiab vice versa). Yog ib nqe lus thim rov qab yog cuav, ces nws converse yog cuav (thiab vice versa). Yog ib nqe lus kev tsis pom zoo yog cuav, ces cov lus yog tseeb (thiab vice versa).

Qhov sib txawv, qhov txawv ntawm Contrapositive thiab inverse yog dab tsi?

Cov thim rov qab yog, thaum peb coj tus negation ntawm lub hypothesis thiab qhov xaus hauv tib yam kev txiav txim: Yog tsis p, ces tsis q. Los yog hauv peb qhov piv txwv: "Yog tias koj tsis haus ntau dhau, ces koj yuav tsis tau hangover." Cov contrapositive yog, noj lub negation ntawm ob qho tib si hypothesis thiab qhov xaus, thiab tom qab ntawd hloov lawv.

Tsis tas li ntawd, qhov hloov pauv ntawm P → Q yog dab tsi? Kev sib tham ntawm p → q yog q → p . Cov inverse ntawm p → q yog ∼ p → ∼ q . Ib nqe lus raws cai thiab nws cov lus sib tham tsis yog qhov sib npaug.

Yog li ntawd, dab tsi yog qhov inverse ntawm nqe lus?

Rov qab ntawm ib tug Conditional. Negating ob lub hypothesis thiab xaus ntawm ib tug conditional nqe lus . Piv txwv li, lub thim rov qab ntawm "Yog los nag ces nyom ntub" yog "Yog tsis los nag ces nyom tsis ntub". Nco tseg: Raws li nyob rau hauv qhov piv txwv, ib qho kev tawm tswv yim yuav muaj tseeb tab sis nws thim rov qab tej zaum yuav tsis muaj tseeb.

Converse Contrapositive thiab inverse yog dab tsi?

Cov sib tham ntawm cov lus qhia yog "Yog Q ces P." Cov contrapositive ntawm cov lus qhia yog "Yog tsis Q ces tsis P." Cov thim rov qab ntawm cov lus qhia yog "Yog tsis P ces tsis Q."