Video: Puas yog qhov nrug yog vector kom muaj nuj nqis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov deb yog ib qho scalar ntau uas yog hais txog "ntau npaum li cas hauv av ib yam khoom tau npog" thaum nws txav. Displacementis ib vector kom muaj nuj nqis uas hais txog "yuav deb npaum li cas ntawm qhov chaw anobject yog"; nws yog tus kwv lub zuag qhia tag nrho kev hloov inposition.
Ntawm no, yog qhov kev ncua deb yog ib qho scalar kom muaj nuj nqis?
Kev hloov pauv yog vector kom muaj nuj nqis thiab tsis yog a scalar kom muaj nuj nqis vim nws tuaj yeem yog A scalarquantity yog ib qho uas tuaj yeem piav qhia los ntawm nws qhov loj xwb thiab tsis xav tau kev taw qhia. Ceev yog ib scalarquantity . Nyob deb , ntawm qhov tod tes, yog a scalarquantity , txij li thaum peb yuav tsum paub tsuas yog txog cov pathtaken.
Ib yam li ntawd, tag nrho qhov nrug yog vector lossis scalar Vim li cas? Kev piav qhia: Scalar Qhov ntau muab qhov loj, thaum vector Qhov ntau muab qhov loj thiab qhov taw qhia. Cov lus teb yuav yog ib qho kev ntsuas uas yuav tsum tau ua nyob rau hauv ib qho kev taw qhia. Nyob deb yog ib qho kev ntsuas ntawm qhov ntev, tsis hais qhov kev taw qhia.
Hais txog qhov no, dab tsi yog vector kom muaj nuj nqis?
Piv txwv li, kev khiav tawm, nrawm, thiab acceleration yog vector ntau , thaum ceev (qhov loj ntawm qhov nrawm), lub sijhawm, thiab qhov hnyav yog qhov ntsuas. Kom tsim nyog raws li ib tug vector , a kom muaj nuj nqis muaj qhov loj thiab kev taw qhia yuav tsum ua raws qee cov cai ntawm kev sib xyaw ua ke.
Puas yog txoj hauj lwm vector?
Kub, ceev, huab hwm coj, thiab ntim yog piv txwv ntawm scalars. Vectors muaj qhov loj thiab kev taw qhia. Lub magnitudeof yog sau | | v. Txoj hauj lwm , hloov chaw, tshaj tawm, acceleration thiab quab yuam yog piv txwv ntawm vector qhov ntau.
Pom zoo:
Qhov twg lub cev muaj nuj nqis Qhov ceev ntawm lub suab nyob ntawm?
Qhov ceev ntawm lub suab hauv huab cua yog txiav txim siab los ntawm huab cua nws tus kheej thiab tsis nyob ntawm qhov amplitude, zaus, lossis wavelength ntawm lub suab. Rau cov roj zoo tagnrho qhov ceev ntawm lub suab tsuas yog nyob ntawm nws qhov ntsuas kub thiab tsis muaj kev ywj pheej ntawm cov roj siab
Koj qhia li cas yog tias daim duab yog qhov muaj nuj nqis tiag tiag?
Ib qho kev ua haujlwm zoo yuav yog xoom ntawm tus nqi tshwj xeeb ntawm x tsuas yog tias tus lej yog xoom ntawm qhov x thiab tus lej tsis yog xoom ntawm x. Hauv lwm lo lus, txhawm rau txiav txim siab seb qhov kev ua haujlwm muaj txiaj ntsig puas yog xoom txhua yam uas peb yuav tsum ua yog teeb tsa tus lej sib npaug rau xoom thiab daws
Cov nqe lus twg zoo tshaj plaws piav qhia txog qhov tseem ceeb ntawm cov lus qhia muaj nuj nqis?
Qhov tsis suav nrog tus nqi ntawm ib qho kev qhia rational yog qhov tseem ceeb uas tus denominator ntawm qhov kev qhia yog xoom. Tsis tas li ntawd, tus naj npawb ntawm zeros ntawm ib tug polynomial yeej ib txwm tsawg dua los yog sib npaug rau degree ntawm lub polynomial. Yog li ntawd, tus naj npawb ntawm cov txiaj ntsig tsis suav nrog cov lus qhia muaj txiaj ntsig tsis tuaj yeem tshaj li qib ntawm tus lej
Cov yam ntxwv ntawm cov ntaub ntawv twg yog qhov ntsuas ntawm tus nqi uas cov ntaub ntawv muaj nuj nqis heev?
Variation: Ib qho kev ntsuas ntawm tus nqi uas cov ntaub ntawv muaj nuj nqis sib txawv. ? Kev faib tawm: Cov xwm txheej lossis cov duab ntawm kev sib kis ntawm cov ntaub ntawv hla ntau qhov tseem ceeb (xws li tswb-puab). ? Outliers: Cov qauv piv txwv uas nyob deb heev ntawm feem ntau ntawm lwm cov qauv nqi
Vim li cas cov haujlwm muaj nuj nqis muaj kev txwv?
Domain txwv tsis pub muaj nuj nqi muaj nuj nqis tuaj yeem txiav txim siab los ntawm kev teeb tsa tus lej sib npaug rau xoom thiab daws. Cov x -values uas tus denominator sib npaug zero yog hu ua singularities thiab tsis nyob rau hauv lub domain ntawm lub functionality