Lub ntsiab txhais ntawm kev daws ntawm ib qho system yog dab tsi?
Lub ntsiab txhais ntawm kev daws ntawm ib qho system yog dab tsi?

Video: Lub ntsiab txhais ntawm kev daws ntawm ib qho system yog dab tsi?

Video: Lub ntsiab txhais ntawm kev daws ntawm ib qho system yog dab tsi?
Video: Tswv Yexus lub neej thaum pib txug thaum xaus 2024, Kaum ib hlis
Anonim

Txhais ( Kev daws teeb)

A daws qhov system ntawm equations yog ib daim ntawv teev cov zauv x, y, z, uas ua rau tag nrho cov kab zauv tseeb ib txhij. Cov daws set ib a qhov system ntawm equations yog sau tag nrho kev daws teeb meem.

Tsis tas li ntawd, dab tsi yog kev daws teeb meem ntawm lub system?

A qhov system ntawm linear equations muaj ob lossis ntau qhov sib npaug piv txwv li. y = 0.5x + 2 y = x - 2. Cov daws ntawm zoo li ib qhov system yog tus txiav txim khub uas yog a daws rau ob qhov sib npaug. Cov daws mus rau qhov system yuav nyob rau hauv lub point uas ob kab sib tshuam.

Tsis tas li ntawd, qhov system txhais li cas hauv lej? A " qhov system " ntawm qhov sib npaug yog ib txheej los yog sau ntawm qhov sib npaug uas koj cuam tshuam nrog tag nrho ua ke ib zaug. Kab sib npaug (tus uas graph li cov kab ncaj) yog qhov yooj yim dua li cov kab zauv uas tsis yog kab sib npaug, thiab qhov yooj yim tshaj plaws linear qhov system yog ib qho nrog ob qhov sib npaug thiab ob qhov sib txawv.

Tsis tas li lo lus nug yog, koj yuav nrhiav kev daws teeb meem ntawm qhov system li cas?

Kev piav qhia: Txoj kev yooj yim tshaj plaws rau kev daws teeb meem tshuab ntawm qhov sib npaug yog hloov ib qho kev sib npaug kom nws tso cai rau kev tshem tawm ntawm qhov sib txawv. Nyob rau hauv cov ntaub ntawv no, peb yuav multiply displaystyle 3x + y = 8 los ntawm kom tau. Tom qab ntawd, peb tuaj yeem ntxiv displaystyle 2x + 4y = 12 rau qhov sib npaug no kom tawm los, yog li.

Dab tsi yog lub ntsiab lus ntawm kev daws teeb meem ntawm ib txoj kab sib npaug?

A daws ntawm a linear system yog ib qho kev muab nqi rau cov variables x1, x2,,xov zoo li txhua tus ntawm kev sib npaug puas yog. Cov teeb ntawm tag nrho cov kev daws teeb meem yog hu ua kev daws teeb meem . A linear system tej zaum yuav coj tus cwj pwm nyob rau hauv ib qho ntawm peb txoj kev ua tau: Tus qhov system muaj ntau infinitely daws.

Pom zoo: