Video: Koj yuav daws tau qhov system ntawm linear equations algebraically li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Siv kev tshem tawm mus daws rau qhov kev daws teeb meem hauv ob kev sib npaug : x + 3y = 4 and 2x + 5y = 5. x = -5, y = 3. Muab txhua nqe lus hauv thawj kev sib npaug los ntawm –2 (koj tau –2x – 6y = –8) thiab ces ntxiv cov nqe lus hauv ob kev sib npaug ua ke. Tam sim no daws -y = -3 rau y, thiab koj tau y = 3.
Kuj paub, thaum daws qhov kev sib npaug ntawm qhov system koj txiav txim siab siv txoj kev twg?
Yog tias ib qho kev sib txawv twb raug cais los yog tuaj yeem yooj yim raug cais tsis muaj feem cuam tshuam, ces siv hloov. Yog ob leeg kev sib npaug yog nyob rau hauv standard form, ces siv tshem tawm.
Ib yam li ntawd, koj yuav nrhiav tau qhov system ntawm kev sib npaug li cas? Nov yog qhov nws mus:
- Kauj Ruam 1: Daws ib qho kev sib npaug rau ib qho ntawm qhov sib txawv. Cia peb daws thawj qhov sib npaug rau y:
- Kauj Ruam 2: Hloov qhov sib npaug mus rau lwm qhov sib npaug, thiab daws rau x.
- Kauj Ruam 3: Hloov x = 4 x = 4 x = 4 rau hauv ib qho ntawm qhov sib npaug qub, thiab daws rau y.
Hais txog qhov no, peb txoj hauv kev los daws qhov system ntawm kev sib npaug yog dab tsi?
Cov peb txoj kev feem ntau siv rau daws systems ntawm equation yog hloov, tshem tawm thiab augmented matrices. Kev hloov pauv thiab tshem tawm yog yooj yim txoj kev uas tuaj yeem ua tau zoo daws feem ntau tshuab ntawm ob kev sib npaug hauv ob peb kauj ruam ncaj nraim.
Nws txhais li cas los daws qhov sib npaug ntawm algebraically?
Cov algebraic txoj kev hais txog ntau txoj kev ntawm daws ib khub ntawm linear kev sib npaug , suav nrog cov duab kos, hloov pauv thiab tshem tawm.
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