Video: Dab tsi yog vectors hauv precalculus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev txhais ntawm a vector . A vector yog ib yam khoom uas muaj ob qhov loj thiab qhov taw qhia. Geometrically, peb tuaj yeem ua duab a vector raws li ib txoj kab ncaj qha ntu, nws qhov ntev yog qhov loj ntawm qhov vector thiab nrog ib tug xub qhia cov kev taw qhia. Ob qho piv txwv ntawm cov duab yog cov uas sawv cev rau lub zog thiab nrawm.
Piv txwv li, vector yog dab tsi?
A vector yog ib qho ntau lossis qhov tshwm sim uas muaj ob qho kev ywj pheej: qhov loj thiab kev taw qhia. Piv txwv ntawm cov duab Nyob rau hauv qhov xwm txheej yog ceev, lub zog, quab yuam, electromagnetic teb, thiab qhov hnyav. (Qhov hnyav yog lub zog tsim los ntawm kev nrawm ntawm lub ntiajteb txawj nqus ua haujlwm ntawm ib pawg.)
Qhov thib ob, pes tsawg hom vectors muaj? Plaub qhov loj hom vectors yog plasmids, viral cov duab , cosmids, thiab dag chromosomes. Ntawm cov no, feem ntau siv cov duab yog plasmids. Common rau txhua tus engineered cov duab yog lub hauv paus chiv keeb ntawm replication, ib qhov chaw multicloning, thiab ib lub cim xaiv.
Ib sab ntawm qhov no, koj yuav ua li cas nrhiav tau daim ntawv ntawm vector?
Cov daim ntawv ntawm ib vector yog tus khub txiav txim uas piav qhia txog kev hloov pauv hauv x- thiab y-tus nqi. Hauv daim duab saum toj no x1= 0, y1= 0 thiab x2= 2, y2=5. Cov khub xaj uas piav qhia txog kev hloov pauv yog (x2- x1, tus y2-y1), hauv peb qhov piv txwv (2-0, 5-0) lossis (2, 5). Ob cov duab sib npaug yog tias lawv muaj qhov sib npaug thiab kev coj ua.
Yuav ua li cas koj denote ib vector?
Point A yog hu ua qhov pib ntawm qhov vector , thiab point B yog hu ua lub davhlau ya nyob twg point. Symbolic notation rau qhov no vector yog (nyeem vector AB”). Vectors kuj yog npe los ntawm cov ntawv boldface xws li u, v, thiab w. Plaub cov duab nyob rau hauv daim duab ntawm sab laug muaj tib qhov ntev thiab kev taw qhia.
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