Lub parabola yog qhov nkhaus tsim los ntawm tag nrho cov ntsiab lus (x, y) uas sib npaug ntawm cov directrix thiab qhov tsom. … Nyob rau hauv cov ntsiab lus ntawm conics, txawm li cas los xij, koj kuj tseem yuav ua haujlwm nrog "sab" parabolas, parabolas uas nws axes ntawm symmetry piv rau x-axis thiab uas qhib rau sab xis lossis sab laug
Yuav ua li cas koj thiaj paub tias parabola yog sideways?
Yog tus x yog squared, lub parabola yog ntsug (qhib los yog nqis). Yog tias tus y yog squared, nws yog kab rov tav (qhib sab laug lossis sab xis). Yog tias qhov zoo, parabola qhib los yog mus rau sab xis. Yog tias nws tsis zoo, nws qhib los yog sab laug.
Puas yog sideways parabola A quadratic?
Graphing "sideways" parabolas yog not ib lub ncauj lus kawm hauv Algebra 1. Parabolas uas qhib rau sab laug lossis sab xis muaj lub xwmfab ntawm y-ntaub ntawv, tsis yog x-ntaub ntawv. Koj tuaj yeem pom los ntawm daim duab uas qhov kev sib raug zoo tsis yog kev ua haujlwm. Nws tsis dhau txoj kab ntsug rau kev ua haujlwm.
Puas yog parabola tig tau?
Kev sib hloov. Cov parabola yooj yim kuj tuaj yeem tig tauPiv txwv li, peb tuaj yeem tig lub parabola yooj yim mus raws li lub hauv paus ntawm 45∘ lossis mus txog 90∘, raws li qhia hauv ob daim duab hauv qab no. Algebraically, qhov sib npaug ntawm thawj parabola yog qhov nyuaj thiab feem ntau tsis tau kawm hauv kev ua lej hauv tsev kawm theem nrab.
Vim li cas ib sab parabola tsis ua haujlwm?
Wikipedia sau tib yam: "Raws li piv txwv, ib sab parabola (ib qho uas nws cov directrix yog kab ntsug) tsis yog daim duab ntawm kev ua haujlwm vim qee cov kab ntsug yuav hla cov parabola ob zaug. "
