Ib qho kev daws teeb meem lossis piv txwv tias is ridulously yooj yim thiab tsis txaus siab. Feem ntau, cov kev daws teeb meem lossis cov piv txwv uas muaj tus lej 0 yog suav tias yog qhov tsis tseem ceeb. Cov kev daws teeb meem tsis yog xoom lossis piv txwv yog suav tias yog qhov tsis tseem ceeb. Piv txwv li, qhov sib npaug x + 5y=0 muaj qhov tsis txaus ntseeg x=0, y=0.
Puas yog qhov kev daws teeb meem tsis tseem ceeb?
Kev daws teeb meem tsis yooj yim yog a cov lus qhia. Piv txwv li, rau homogeneous linear equation 7x + 3y−10z=0 nws yuav yog qhov tsis tseem ceeb los nrhiav / txheeb xyuas tias (1, 1, 1) yog kev daws teeb meem. Tab sis lo lus tsis tseem ceeb yog tshwj xeeb rau kev daws teeb meem suav nrog xoom qhov tseem ceeb rau txhua qhov sib txawv.
Yuav ua li cas rau kev daws qhov tsis tseem ceeb?
A nxn homogeneous system ntawm kab zauv sib npaug muaj ib qho kev daws teeb meem (cov tshuaj tsis tseem ceeb) yog tias thiab tsuas yog tias nws qhov kev txiav txim siab tsis yog xoom. Yog tias qhov kev txiav txim siab no yog xoom, ces lub kaw lus muaj cov kev daws teeb meem tsis kawg.
txhais li cas rau kev daws qhov tsis tseem ceeb?
"tsis tseem ceeb" kuj tuaj yeem siv los piav qhia cov kev daws teeb meem rau qhov sib npaug uas muaj cov qauv yooj yim, tab sis rau qhov ua tiav tsis tuaj yeem tshem tawm. Cov kev daws teeb meem no yog hu ua cov kev daws teeb meem tsis tseem ceeb. Piv txwv li, xav txog qhov sib npaug sib txawv.
Koj txhais li cas los ntawm kev daws teeb meem tsis tseem ceeb?
1. tsis tseem ceeb. 2. lej. sau ib qho kev daws teeb meem ntawm kab zauv kab zauv uas tus nqi tsawg kawg yog ib qho kev sib txawv ntawm qhov sib npaugtsis sib npaug rau xoom.
