Video: Muaj pes tsawg txoj kev daws teeb meem yog linear equation?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Systems ntawm linear equations tau nkaus xwb muaj 0, 1, lossis tus lej tsis kawg kev daws teeb meem . Ob kab no tsis tuaj yeem hla ob zaug. Cov lus teb raug yog tias tus system muaj ib daws.
Xav txog qhov no, pes tsawg txoj kev daws teeb meem ib kab zauv muaj?
A qhov system ntawm linear equations feem ntau muaj ib ib daws , tab sis qee zaum nws tuaj yeem ua tau muaj tsis muaj daws (parallel kab) los yog infinite kev daws teeb meem (ib kab). Kab lus no tshuaj xyuas tag nrho peb qhov xwm txheej. Ib daws . A qhov system ntawm linear equations muaj ib daws thaum cov duab sib tshuam ntawm ib qho chaw.
Qhov thib ob, lub linear system puas muaj ob txoj kev daws teeb meem? Qhov system ntawm ob linear kev sib npaug ua tau 't muaj raws nraim leej twg kev daws teeb meem . Qhov laj thawj yog thaum peb muaj ob ncaj kab, lawv ua tau tsuas yog sib tshuam ntawm ib qho kev sib tshuam, tsis muaj ntxiv lawm. Yog li kom rov hais dua, qhov system ntawm ob linear kev sib npaug tuaj yeem muaj ib leeg xwb daws , lawv ua tau 't muaj raws nraim ob txoj kev daws teeb meem.
Ua raws li qhov no hauv kev txiav txim siab, koj yuav ua li cas paub yog tias kab zauv sib npaug muaj qhov kev daws teeb meem tsis kawg?
Ib qho 1-variable linear equation qhov twg qhov sib txawv tsis thim tawm mus rau xoom yuav tsim ib qho daws . Yog cov variables rho tawm mus rau xoom, ces tus kev sib npaug yuav muaj tsis muaj daws los yog kev daws teeb meem tsis kawg nyob ntawm qhov muaj nuj nqis ntawm qhov tsis tu ncua siv nyob rau hauv kev sib npaug.
Qhov kev sib npaug twg tsis muaj kev daws teeb meem?
Cov daws x = 0 txhais tau tias tus nqi 0 txaus siab rau kev sib npaug , yog li muaj ib daws . “ Tsis muaj tshuaj ” txhais tau tias muaj tsis muaj tus nqi, tsis txawm 0, uas yuav txaus siab rau kev sib npaug . Tsis tas li ntawd, ceev faj tsis txhob ua yuam kev ntawm kev xav tias tus kev sib npaug 4 = 5 txhais tau hais tias 4 thiab 5 yog qhov tseem ceeb rau x uas yog kev daws teeb meem.
Pom zoo:
Muaj pes tsawg txoj kev daws teeb meem tib kab muaj?
Cov kab ke ntawm kab sib npaug tuaj yeem tsuas muaj 0, 1, lossis ib qho kev daws teeb meem tsis kawg. Ob kab no tsis tuaj yeem hla ob zaug. Cov lus teb raug yog tias qhov system muaj ib qho kev daws teeb meem
Koj yuav daws tau qhov teeb meem linear programming li cas los ntawm txoj kev ntawm cov ces kaum?
METHOD OF CONNERS Khiav cov teeb tsa ua tau (tej thaj tsam), S. Nrhiav qhov EXACT coordinates ntawm tag nrho cov vertices (kaum cov ntsiab lus) ntawm S. Ntsuas lub hom phiaj muaj nuj nqi, P, ntawm txhua vertex Qhov siab tshaj plaws (yog tias muaj) yog qhov loj tshaj ntawm tus nqi ntawm P ntawm vertex. Qhov tsawg kawg nkaus yog qhov tsawg tshaj plaws tus nqi ntawm P ntawm vertex
Puas yog nws ua tau rau ib qho kev sib npaug ntawm ob txoj kab sib npaug kom tsis muaj kev daws teeb meem piav qhia koj qhov laj thawj?
Cov kab ke ntawm kab sib npaug tuaj yeem tsuas muaj 0, 1, lossis ib qho kev daws teeb meem tsis kawg. Ob kab no tsis tuaj yeem hla ob zaug. Cov lus teb raug yog tias qhov system muaj ib qho kev daws teeb meem. Total Number of Points Number of 2-Point Baskets Number of 3-Point Baskets 17 4 (8 ntsiab lus) 3 (9 points) 17 1 (2 points) 5 (15 points)
Muaj pes tsawg txoj kev daws teeb meem muaj qhov system?
ib xal Ua raws li qhov no hauv kev txiav txim siab, pes tsawg txoj kev daws teeb meem puas muaj qhov sib npaug? Ib qho kev sib npaug ntawm cov kab sib npaug feem ntau muaj ib qho kev daws teeb meem, tab sis qee zaum nws tuaj yeem tsis muaj kev daws teeb meem (cov kab sib txuas) lossis cov kev daws teeb meem tsis kawg (tib kab).
Dab tsi yog qhov kev faib tawm ntawm cov teeb meem raws li muaj pes tsawg leeg?
Cov teeb meem tuaj yeem muab faib ua ob pawg dav: cov tshuaj ntshiab thiab cov khoom sib tov. Cov khoom ntshiab yog ib daim ntawv ntawm cov teeb meem uas muaj qhov sib xyaw ua ke thiab cov khoom uas tsis tu ncua thoob plaws hauv cov qauv. Kev sib xyaw ua ke yog kev sib xyaw ua ke ntawm ob lossis ntau lub ntsiab lus thiab / lossis cov khoom sib txuas