Puas muaj qhov tseem ceeb muaj kev txwv?
Puas muaj qhov tseem ceeb muaj kev txwv?

Video: Puas muaj qhov tseem ceeb muaj kev txwv?

Video: Puas muaj qhov tseem ceeb muaj kev txwv?
Video: Nkauj Ntseeg Tawm Tshiab 2022 | “Qhov Tseem Ceeb ntawm Kev Thov Vajtswv” 2024, Kaum ib hlis
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txwv nrog Tus nqi tsis txaus . txwv koom nrog qhov tseem ceeb feem ntau cuam tshuam cov khoom rau hauv rooj plaub. Nco ntsoov tias |f(x)|={f(x), if f(x)≧0;−f(x), if f(x)≦0.

Kuj nug, koj puas tuaj yeem ua qhov tseem ceeb?

Muaj ob txoj kev daws teeb meem x = a thiab x = -a vim tias ob tus lej nyob ntawm qhov deb ntawm 0. Koj pib los ntawm kev ua nws rau hauv ob qhov sib npaug sib cais thiab tom qab ntawd daws lawv sib cais. Ib tus nqi kiag kev sib npaug tsis muaj kev daws teeb meem yog tias tus tus nqi kiag kev qhia sib npaug ntawm tus lej tsis zoo txij li ib tus nqi kiag li yeej tsis phem.

Ib sab saum toj no, cov kev txwv hauv lej yog dab tsi? Txwv ( lej ) Ib lej , a txwv yog tus nqi uas muaj nuj nqi (los yog ib ntus) "txoj hauv kev" raws li cov tswv yim (lossis qhov ntsuas) "txoj hauv kev" qee tus nqi. txwv yog qhov tseem ceeb rau kev suav (thiab lej tsom xam nyob rau hauv dav) thiab yog siv los txhais continuity, derivatives, thiab integrals.

Ib yam li ntawd, nws nug, peb hom kev tsis sib haum xeeb yog dab tsi?

  • Discontinuities tuaj yeem faib ua dhia, tsis kawg, tshem tau, qhov kawg, lossis sib xyaw.
  • Kev tshem tawm tsis tu ncua yog tus cwj pwm los ntawm qhov tseeb tias qhov txwv muaj.
  • Kev tshem tawm tsis tu ncua tuaj yeem "kho" los ntawm kev rov txhais cov haujlwm.

Puas yog tus nqi tiag tiag ua haujlwm txawv?

Thaum a muaj nuj nqi yog sib txawv nws tseem tsis tu ncua. Tab sis a muaj nuj nqi tuaj yeem txuas ntxiv tab sis tsis yog sib txawv . Piv txwv li cov tag nrho muaj nuj nqis muaj nuj nqi yog ua tau tas mus li (txawm tsis yog sib txawv ) x = 0.

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