Cov txheej txheem:

Yuav ua li cas koj pom qhov cuam tshuam ntawm kev tsis sib xws?
Yuav ua li cas koj pom qhov cuam tshuam ntawm kev tsis sib xws?

Video: Yuav ua li cas koj pom qhov cuam tshuam ntawm kev tsis sib xws?

Video: Yuav ua li cas koj pom qhov cuam tshuam ntawm kev tsis sib xws?
Video: 8 yam tsis txhob ua thaum sib deev tag tsis li yuav phom sij txog lub neej txoj sia. 2024, Kaum ib hlis
Anonim

Xwb, peb tuaj yeem txiav txim siab x- cuam tshuam thiab y- cuam tshuam ntawm tus qauv daim ntawv linear kev tsis sib xws los ntawm kev hloov y = 0, ces daws rau x thiab hloov x = 0, ces daws rau y feem. Recall tias thex- cuam tshuam yog tus nqi ntawm x thaum y = 0 thiab lawv- cuam tshuam yog tus nqi ntawm y thaum x = 0.

Ntawm no, koj pom Y cuam tshuam li cas ntawm qhov tsis sib xws?

Koj ua tau nrhiav tus y - cuam tshuam bylooking ntawm daim duab thiab pom qhov point hla tus y axis. Cov ntsiab lus no ib txwm muaj x coordinate ntawm zero. Qhov no yog lwm txoj kev nrhiav tus y - cuam tshuam , yog koj paub cov equation, ua y - cuam tshuam yog qhov kev daws rau qhov sib npaug thaum x = 0. Wb nrhiav qhov sib npaug rau kab no.

Tsis tas li ntawd, koj yuav ua li cas rov kho cov kab tsis sib xws? Yuav ua li cas kos ib kab tsis sib xws

  1. Rearrange qhov sib npaug kom "y" nyob rau sab laug thiab txhua yam ntawm sab xis.
  2. Teem lub "y = kab" (ua rau nws yog ib txoj kab ruaj khov rau y≤ ory≥, thiab ib kab dashed rau y)
  3. Duab ntxoov ntxoo saum kab rau "ntau dua" (y> lossis y≥) lossis hauv qab kab rau "tsawg dua" (y< lossis y≤).

Hauv qhov no, cov kev daws teeb meem rau qhov tsis sib xws yog dab tsi?

"Solving" ib kev tsis sib xws txhais tau tias nrhiav txhua yam ntawm nws kev daws teeb meem . A " daws ''of ib kev tsis sib xws yog tus lej uas thaum hloov pauv rau qhov sib txawv ua rau kev tsis sib xws ib nqe lus tseeb. Thaum peb hloov 8 rau x, lub kev tsis sib xws ua 8-2 > 5. Yog li, x=8 is a daws tus kev tsis sib xws.

Koj yuav daws qhov tsis sib npaug ntawm plaub npaug li cas?

Yuav kom daws tau qhov tsis sib xws quadratic, ua raws li cov kauj ruam no:

  1. Kho qhov tsis sib xws xws li qhov sib npaug.
  2. Ua kom cov ntsiab lus ciam teb cov voj voog yog qhov qub tsis sib xws nrog kev sib luag; txwv tsis pub, ua cov ciam teb pointopen voj voog.
  3. Xaiv cov ntsiab lus los ntawm txhua cheeb tsam tsim los ntawm cov ciam teb.

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