Yuav Ua Li Cas Daim Duab Ua Haujlwm Ntawm Niam Txiv

Los ntawm Yang Kuang, Elleyne Kase

Hauv kev ua lej, koj pom qee yam ntawm kev rov ua dua. Vim li ntawd, cov txuj qub qub no, hu ua niam txiv daim duab, thiab lawv suav nrog cov duab ua ntawm plaub fab ua haujlwm, lub hauv paus xwm fab, qhov muaj nuj nqis, cubic, thiab keeb kwm cube Cov.



Kos duab ua haujlwm quadratic

Quadratic haujlwm yog cov kev ua haujlwm hauv lub zog thib 2, lossis xwm txheej, yog qhov siab tshaj uas cov tsis paub ntau thiab cov kuj sib txawv tau tsa .. Cov haujlwm Y = x ob lossis f ( x ) = x obyog plaub fab ua muaj nuj nqi, thiab yog niam txiv daim duab rau tas nrho lwm lub zog ua neeg.



Txoj hauv kev luv rau kev teeb tsa cov haujlwm f ( x ) = x obyog pib ntawm tus taw tes (0, 0) (tus keeb kwm ) thiab cim tus taw tes, hu ua tus vertex. Nco ntsoov tias tus taw tes (0, 0) yog qhov txiav txim ntawm cov niam txiv muaj nuj nqi nkaus xwb. Hauv kev suav, cov ntsiab lus no hu ua a ntsiab lus tseem ceeb, thiab qee cov xibfwb qhia ntawv ua ntej yuav siv tau cov lus ntawd. Tsis tas tau txais mus rau hauv lub laij lej txhais, nws txhais tau tias qhov kis tshwj xeeb.

Lub duab ntawm cov ua haujlwm plaub fab hu ua a parabola. Txhua tus parabolas muaj qhov zoo sib xws. Yog xav tau lwm cov ntsiab lus, koj sau cov ntsiab lus (1,1ob) = (1,1), (2,2ob) = (2.4), (3.3ob) = (3,9), thiab lwm yam Cov duab kab sib chaws no tshwm sim nyob rau sab kawg ntawm lub vertex zoo li thiab tseem yuav mus, tab sis feem ntau tsuas yog ob peb ntsiab lus ntawm ob sab ntawm lub vertex muab koj lub tswv yim zoo ntawm daim duab zoo li cas.



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Daim duab no qhia tau ib qho piv txwv ntawm qhov ua haujlwm quadratic hauv graph form.

Kos duab xwm fab-paus ua haujlwm

TO duab xwm fab cag muaj feem xyuam rau cov duab plaub npaug. Lub duab plaub yog f ( x ) = x ob, whereas daim phiaj xwm-hauv paus yog g ( x ) = x 1/2Cov. Lub teeb ntawm lub voj voos xwm fab ua haujlwm zoo li sab laug ib nrab ntawm cov kab ntsig uas tau tig 90 degrees raws li moos. Koj tuaj yeem tuaj yeem sau lub voos xwmfab ua haujlwm li



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Txawm li cas los xij, tsuas yog ib nrab ntawm cov neeg nqa tawm xwb, rau ob qho laj thawj. Ua ntej, nws cov niam txiv teeb duab tsuas yog thaum x yog xoom lossis qhov zoo (vim tias koj tsis tuaj yeem nrhiav pom lub hauv paus ntawm cov lej tsis zoo [thiab khaws cia rau lawv tiag tiag, xijpeem]). Thib ob, tus pas ntsuas kub tshwm sim tsuas yog thaum g ( x ) yog qhov zoo vim tias thaum koj tau nug kom nrhiav

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Koj raug hais kom nrhiav tsuas yog tus thawj xib fwb lossis lub hauv paus zoo ntawm x ..

amoxicillin qhov ntswg kab mob ntau npaum

Daim duab no pib ntawm lub hauv paus chiv keeb (0, 0) thiab tom qab ntawd hloov mus rau (1, sqrt (1)) = (1,1), (2, sqrt (2)), (3, sqrt (3)), thiab lwm yam.

Daim duab no,

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qhia cov duab kab rau niam txiv xwm fab xwm cag

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Nco ntsoov tias qhov muaj nuj nqis koj tau txais los ntawm kev kwv yees cov ntsiab lus sib law liag tsis muab koj tus lej xov tooj zoo tshaj plaws. Hloov chaw, sim xaiv qhov tseem ceeb rau qhov uas koj tuaj yeem yooj yim nrhiav tau lub hauv paus plaub fab. Nov yog li cas qhov no ua haujlwm: Pib ntawm (0, sqrt (0)) = (0,0), tom qab ntawd mus rau (1, sqrt (1)) = (1,1), tom qab ntawd mus rau (4, sqrt (4)) = (4,2), tom qab ntawd rau (9, sqrt (9)) = (9,3), thiab lwm yam.

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Kos duab txog tus nqi-ua haujlwm

Qhov tsis muaj nqi ntawm niam txiv daim duab ntawm lub luag haujlwm Y = = x | hloov tag nrho cov kev tawm tswv yim tsis-tsis zoo (0 lossis zoo). Los teeb qhia qhov tseem ceeb-muaj nuj nqi, koj pib ntawm lub hauv paus chiv keeb thiab tom qab ntawd txhua tus naj npawb zoo tau mapped rau nws tus kheej, thaum txhua tus lej tsis zoo tau mapped rau nws qhov kev sib raug zoo.

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Daim duab no qhia tau cov duab kab ntawm qhov muaj nuj nqi tiag.

Daim duab ua haujlwm qhov cub sau lo lus

Hauv a qhov cub muaj nuj nqi, tau siab tshaj plaws ntawm kev hloov tau yog peb. Cov nuj nqi f ( x ) = x 3yog niam txiv muaj nuj nqi. Koj pib pib ua qhov cub ua haujlwm leej niam leej txiv teeb ntawm lub hauv paus pib (0, 0) Cov.

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Los ntawm (0,0), koj teeb (1,13) = (1,1), (2,23) = (2,8), thiab ntxiv rau sab laug ntawm (0,0) koj teeb (-1, (- 1)3) = (- 1, -1), (-2, (- 2)3) = (- 2, -8), thiab lwm yam .. Tus niam txiv lub luag haujlwm, g ( x ) = x 3, yog qhia nyob hauv daim foos daim duab hauv daim duab no.

Kos duab lub voos xwmfab-lub zog

Thawv muaj rau sab cag muaj feem xyuam rau cubic zog hauv tib txoj kev uas lub hauv paus plaub fab kev ua haujlwm muaj feem xyuam nrog plaub fab sib luag. Koj sau sau ntawv cubic functions li f ( x ) = x 3thiab thawv muaj cag lub zog g ( x ) = x 1/3lossis

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Ntsoov tias qhov cube-lub hauv paus muaj nuj nqi yog qhov tseem ceeb vim tias nws pab koj teeb nws.

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