Cov txheej txheem:
Video: Puas yog lub hom phiaj ua haujlwm ib txwm muaj qhov siab tshaj plaws lossis tsawg kawg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub Hom Phiaj Ua Haujlwm
Nws ua tau los yog muaj qhov siab tshaj plaws nqi, a yam tsawg kawg nkaus tus nqi, ob qho tib si, lossis tsis yog. Nws tag nrho yog nyob ntawm thaj tsam ua tau. Muaj ob hom kev sib txawv ntawm cheeb tsam: thaj tsam uas muaj ciam teb thiab tsis muaj thaj tsam. Cov yam tsawg kawg nkaus los yog siab kawg tus nqi xws li Lub hom phiaj muaj nuj nqi ib txwm tshwm sim ntawm vertex ntawm thaj tsam ua tau.
Ua raws li qhov no hauv kev txiav txim siab, koj yuav ua li cas thiaj nrhiav tau qhov siab tshaj plaws thiab qhov tsawg kawg nkaus ntawm txoj haujlwm linear?
Piv txwv li, lub siab kawg los yog yam tsawg kawg nkaus tus nqi ntawm f (x, y) = ax + by + c tshaj cov txheej txheem daws teeb meem tshwm sim ntawm point A, B, C, D, E lossis F. Thaum daim duab ntawm ib qho system ntawm kev tsis sib xws tsim ib cheeb tsam uas raug kaw, cheeb tsam tau hais tias yuav tsum muaj kev cia siab.
Tsis tas li ntawd, lub hom phiaj ua haujlwm hauv lej yog dab tsi? Lub Hom Phiaj Ua Haujlwm : Cov Lub hom phiaj ua haujlwm nyob rau hauv ib tug lej optimization teeb meem yog lub real-valued muaj nuj nqi nws tus nqi yuav tsum tau txo qis los yog maximized tshaj cov txheej txheem ua tau. Hauv qhov teeb meem P saum toj no, lub teeb X yog thaj tsam ua tau.
Tom qab ntawd, lo lus nug yog, yog vim li cas qhov tsawg kawg nkaus ntawm kev ua haujlwm linear tshwm sim ntawm qhov vertex?
5 Teb. Tsuas yog cov kab uas hla ntawm thaj tsam ua tau txaus siab rau tag nrho cov kev txwv vim tias koj tuaj yeem ua x, y qhov tseem ceeb xws li tias lawv poob rau hauv cheeb tsam ua tau thiab lub hom phiaj ua haujlwm. Yog li ntawd lub vertex A muab cov siab kawg tus nqi rau lub hom phiaj ua haujlwm.
Yuav ua li cas koj thiaj nrhiav tau tus nqi siab tshaj plaws ntawm kev ua haujlwm?
Yuav ua li cas thiaj txiav txim siab tus nqi siab tshaj
- Yog tias koj qhov kev sib npaug yog nyob rau hauv daim ntawv ax2 + bx + c, koj tuaj yeem pom qhov siab tshaj plaws los ntawm kev siv qhov sib npaug:
- max = c - (b2 / 4a).
- Thawj kauj ruam yog los txiav txim seb koj qhov kev sib npaug muab qhov siab tshaj plaws lossis qhov tsawg kawg nkaus.
- -x2 + 4x - 2.
- Txij li thaum lub sij hawm nrog x2 yog qhov tsis zoo, koj paub tias yuav muaj qhov siab tshaj plaws.
Pom zoo:
Dab tsi yog rau qhov sib txawv loj ntawm lub koom haum los ntawm qhov tsawg tshaj plaws mus rau loj tshaj plaws ecologists?
Lub koom haum loj yog dab tsi, los ntawm qhov tsawg tshaj plaws mus rau qhov loj, uas cov kws tshawb fawb feem ntau kawm? 6 theem sib txawv ntawm lub koom haum uas ecologists nquag kawm yog hom, pejxeem, zej zog, ecosystem, thiab biome
Qhov siab tshaj plaws thiab qhov tsawg kawg nkaus hauv lej yog dab tsi?
Hauv kev ua lej, qhov siab tshaj plaws thiab qhov tsawg kawg nkaus ntawm qhov muaj nuj nqi yog qhov loj tshaj plaws thiab qhov tsawg tshaj plaws uas qhov kev ua haujlwm yuav siv ntawm ib qho chaw. Yam tsawg kawg txhais tau tias qhov tsawg tshaj plaws koj tuaj yeem ua tau ib yam dab tsi
Tus txheeb ze yam tsawg kawg nkaus thiab qhov siab tshaj plaws yog dab tsi?
Ib qho piv txwv siab tshaj plaws yog qhov taw tes uas qhov kev ua haujlwm hloov pauv kev coj ua los ntawm kev nce mus rau qis (ua qhov taw tes rau 'peak' hauv daim duab). Ib yam li ntawd, qhov txheeb ze qhov tsawg kawg nkaus yog qhov taw tes uas qhov kev ua haujlwm hloov pauv kev taw qhia los ntawm kev txo qis mus rau nce (ua qhov taw tes ntawd 'hauv qab' hauv daim duab)
Qhov siab tshaj plaws lossis qhov tsawg kawg nkaus ntawm parabola yog dab tsi?
Vertical parabolas muab cov ntaub ntawv tseem ceeb: Thaum lub parabola qhib, lub vertex yog qhov qis tshaj plaws ntawm daim duab - hu ua qhov tsawg kawg nkaus, lossis min. Thaum lub parabola qhib, lub vertex yog qhov siab tshaj plaws ntawm daim duab - hu ua themaximum, lossis max
Dab tsi yog qhov yuam kev loj tshaj plaws yog tias Irina ntsuas qhov ntev ntawm nws lub qhov rais li 3.35 feet qhov yuam kev loj tshaj plaws yog taw?
Kev daws: Qhov yuam kev loj tshaj plaws hauv kev ntsuas ntsuas tau txhais tias yog ib nrab ntawm qhov ntsuas ntsuas