Video: Yuav ua li cas koj nrhiav tau lub sab sauv cia?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tau ib sab saud teb, peb yuav xav faib tus lej loj ( sab saud ) los ntawm tus lej me (qis dua khi ). Qhov qis dua khi kev faib yuav yog qhov opposite; faib me me (qis dua khi ) los ntawm tus nqi loj tshaj plaws ( sab saud ). Siv koj lub sijhawm nrog cov lus nug no thiab qhia tag nrho koj txoj haujlwm.
Ib yam li ntawd ib tug yuav nug, ua li cas koj xam lub sab sauv cia?
Yuav nrhiav tau sab saud ntawm ib qho ntxiv los yog ntawm ib cheeb tsam, koj yuav xav muab cov sab sauv ciam teb ntawm ob qhov kev ntsuas, raws li qhov no yuav muab qhov loj tshaj plaws / thaj tsam. Whereas kom tau qis khi ntawm qhov sib ntxiv lossis sib npaug (xws li cheeb tsam) koj yuav muab qhov qis dua ciam teb ntawm ob qhov kev ntsuas.
Tsis tas li ntawd, koj yuav ua li cas thiaj nrhiav tau lub sab sauv ntawm ib tug polynomial? Yog koj faib a polynomial muaj nuj nqi f(x) los ntawm (x - c), qhov twg c > 0, siv hluavtaws faib thiab qhov no yields tag nrho cov lej zoo, ces c yog ib qho sab saud mus rau lub hauv paus tiag tiag kev sib npaug f(x) = 0. Nco ntsoov tias ob yam yuav tsum tshwm sim rau c ua ib qho sab saud . Ib qho yog c> 0 lossis zoo.
Yog li ntawd, lub sab sauv txhais li cas hauv lej?
Upper Bound . Tus nqi ntawd yog ntau dua los yog sib npaug rau txhua yam ntawm cov ntaub ntawv. Piv txwv li: hauv {3, 5, 11, 20, 22} 22 yog ib sab saud.
Dab tsi yog qhov txwv ntawm qhov tseeb?
Txhawm rau piav qhia txhua qhov txiaj ntsig tau uas tus lej sib npaug tuaj yeem yog, peb siv txwv qhov raug . Qhov qis txwv yog tus nqi tsawg tshaj plaws uas yuav sib npaug mus rau qhov kwv yees tus nqi. Lub sab sauv txwv yog tus nqi tsawg tshaj plaws uas yuav sib npaug mus rau tus nqi kwv yees tom ntej.
Pom zoo:
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