Qhov kev sib tham ntawm P yog dab tsi? Q?

2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47

Hauv logic thiab lej, lub sib tham ntawm ib nqe lus categorical los yog implical yog qhov tshwm sim ntawm kev thim rov qab nws ob nqe lus tseem ceeb. Rau qhov cuam tshuam P → Q , cov sib tham yog Q → P . Rau cov lus pom zoo categorical Txhua S yog P , cov sib tham yog Txhua P yog S.

Tsis tas li ntawd, qhov Contrapositive ntawm P → Q yog dab tsi?

Contrapositive ntawm a nqe lus hais ntawm daim ntawv "Yog p ces q" yog "Yog ~q ces ~p". Symbolically, lub contrapositive ntawm p q yog ~ q ~ p. A nqe lus hais yog logically sib npaug rau nws contrapositive.

Tsis tas li ntawd, qhov twg yog qhov kev sib tham ntawm P → Q Brainly? Nyob rau hauv logic, lub converse ntawm a nqe lus hais yog qhov tshwm sim ntawm thim rov qab nws ob ntu. Piv txwv li, nqe lus P → Q, muaj lub converse ntawm Q → P. Rau cov nqe lus muab, 'Yog hais tias ib daim duab yog ib daim duab plaub, ces nws yog ib tug parallelogram. ' lub converse yog 'yog tias daim duab yog parallelogram, ces nws yog duab plaub.

Tsis tas li ntawd, qhov kev sib tham ntawm ib nqe lus yog dab tsi?

Converse . Hloov lub hypothesis thiab xaus ntawm ib tug conditional nqe lus . Piv txwv li, lub sib tham ntawm "Yog tias nag los nag ces nyom ntub" yog "Yog nyom ntub ces nag los." Nco tseg: Raws li hauv qhov piv txwv, qhov kev xav yuav muaj tseeb tab sis muaj qhov tsis tseeb sib tham.

Dab tsi yog converse inverse thiab contrapositive ntawm nqe lus?

Converse , Contrapositive , thiab Rov qab . Cov sib tham ntawm lub conditional nqe lus yog "Yog Q ces P." Cov contrapositive ntawm lub conditional nqe lus yog "Yog tsis Q ces tsis P." Cov thim rov qab ntawm lub conditional nqe lus yog "Yog tsis P ces tsis Q."