Video: Tus nqi siab tshaj ntawm qhov ua haujlwm yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov tus nqi siab tshaj ntawm a muaj nuj nqi yog qhov chaw a muaj nuj nqi mus txog nws qhov siab tshaj plaws, lossis vertex, ntawm ib daim duab. Piv txwv li, hauv daim duab no, lub tus nqi siab tshaj plaws ntawm kev ua haujlwm yog y5.
Tsis tas li ntawd kom paub yog, koj ua li cas nrhiav qhov tsawg kawg nkaus thiab siab tshaj tus nqi ntawm ib txoj haujlwm?
Koj tuaj yeem siv daim duab los txheeb xyuas qhov vertex lossis koj tuaj yeem nrhiav tau yam tsawg kawg nkaus los yog tus nqi siab tshaj algebraically siv cov qauv x = -b / 2a. Cov qauv no yuav muab rau koj x-coordinate ntawm lub vertex. Tsuas yog hloov tus x hauv koj qhov kev sib npaug qub nrog tus tus nqi ntawm x-coordinate thiab ces daws rau y.
Qhov thib ob, koj ua li cas thiaj nrhiav tau tus nqi siab tshaj plaws ntawm sine muaj nuj nqi? Cov tus nqi siab tshaj ntawm muaj nuj nqi yog M = A + |B|. Qhov no tus nqi siab tshaj tshwm sim thaum twg sin x = 1 los yog cos x = 1. Qhov tsawg kawg nkaus tus nqi ntawm muaj nuj nqi yog m = A - |B|. Qhov tsawg kawg no tshwm sim thaum twg sin x = −1 los yog cos x = −1.
Tsis tas li lo lus nug yog, tus nqi siab tshaj txhais li cas?
Qhov siab tshaj plaws , Nyob rau hauv lej, ib tug point ntawm uas muaj nuj nqi tus nqi yog qhov loj tshaj. Yog tias tus nqi yog ntau dua lossis sib npaug rau tag nrho lwm cov haujlwm tus nqi , nws yog qhov tseeb siab kawg . Yog tias nws tsuas yog ntau dua li qhov chaw nyob ze, nws yog ib tus txheeb ze, lossis hauv zos, siab kawg.
Koj pom qhov ntau npaum li cas?
Summary: Lub ntau ntawm ib txheej ntawm cov ntaub ntawv yog qhov sib txawv ntawm qhov siab tshaj thiab qis tshaj qhov tseem ceeb hauv cov txheej txheem. Rau nrhiav qhov ntau , ua ntej xaj cov ntaub ntawv los ntawm tsawg kawg mus rau qhov loj tshaj plaws. Tom qab ntawd rho tus nqi tsawg tshaj plaws los ntawm tus nqi loj tshaj plaws hauv cov teeb.
Pom zoo:
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