Cov txheej txheem:

Domain thiab ntau yam yog dab tsi?
Domain thiab ntau yam yog dab tsi?

Video: Domain thiab ntau yam yog dab tsi?

Video: Domain thiab ntau yam yog dab tsi?
Video: XENGYANG - NWS YOG DAB TSIS (WHAT'S MEANS) [Official Music Video] 2024, Kaum ib hlis
Anonim

Vim lub sau npe hais txog cov txheej txheem ntawm cov khoom siv tau, cov sau npe ntawm ib daim duab muaj tag nrho cov input qhov tseem ceeb qhia nyob rau hauv x-axis. Cov ntau yog cov txheej txheem ntawm cov txiaj ntsig tau tso tawm, uas tau qhia ntawm y-axis.

Tib neeg kuj nug, koj nrhiav tau li cas?

Rau hom kev ua haujlwm no, lub sau npe yog txhua tus lej tiag. Kev ua haujlwm nrog ib feem nrog qhov sib txawv hauv tus lej. Rau nrhiav tus sau npe ntawm hom kev ua haujlwm no, teeb tsa hauv qab sib npaug rau xoom thiab tsis suav nrog x tus nqi koj nrhiav thaum koj daws qhov sib npaug. Ib qho kev ua haujlwm nrog qhov sib txawv hauv lub cim radical.

Tom qab ntawd, lo lus nug yog, koj nrhiav tau 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.

Xav txog qhov no, koj yuav teb li cas rau npe thiab ntau yam?

Qhov tseeb teb yog: The sau npe yog txhua tus lej tiag thiab cov ntau yog tag nrho cov zauv tiag f(x) xws li f(x) ≧ 7. Txawm hais tias muaj nuj nqi yuav muab tau raws li "muaj nuj nqis tiag," nws yuav yog qhov ua haujlwm muaj kev txwv rau nws. domain thiab ntau yam . Tej zaum yuav muaj qee tus lej tiag uas tsis tuaj yeem yog ib feem ntawm sau npe los yog ib feem ntawm cov ntau.

Yuav ua li cas peb thiaj nrhiav tau qhov ntau ntawm ib txoj haujlwm?

Zuag qhia tag nrho, cov kauj ruam rau algebraically nrhiav qhov ntau ntawm kev ua haujlwm yog:

  1. Sau y = f (x) thiab tom qab ntawd daws qhov sib npaug rau x, muab qee yam ntawm daim ntawv x = g (y).
  2. Nrhiav qhov chaw ntawm g(y), thiab qhov no yuav yog qhov ntau ntawm f(x).
  3. Yog tias koj zoo li tsis tuaj yeem daws rau x, ces sim ua cov duab kos kom pom qhov ntau.

Pom zoo: