Cov txheej txheem:
Video: Puas yog ob txoj kab sib luag zoo sib xws lossis tsis sib xws?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog tias ob equations piav kab sib npaug , thiab li ntawd kab uas tsis sib tshuam, lub system yog ywj siab thiab tsis sib xws . Yog tias ob equations piav tib yam kab , thiab li ntawd kab uas cuam tshuam tus naj npawb tsis kawg ntawm lub sijhawm, qhov system yog nyob ntawm thiab zoo ib yam.
Tom qab ntawd, ib tug kuj yuav nug, ua li cas koj thiaj paub yog tias ob qhov sib npaug sib npaug lossis tsis sib xws?
Yog tias ib qho kev sib raug zoo muaj ib qho kev daws teeb meem, nws yog ywj siab
- Yog hais tias ib tug zoo ib yam system muaj ib tug infinite cov kev daws, nws yog nyob ntawm seb. Thaum koj kos cov kab zauv, ob qho tib si sib npaug sawv cev tib kab.
- Yog tias qhov system tsis muaj kev daws teeb meem, nws tau hais tias tsis sib haum.
Puas yog qhov kev sib npaug sib npaug sib npaug thiab sib npaug lossis tsis sib xws? A system ntawm equations yog zoo ib yam yog tias nws muaj tsawg kawg yog ib qho kev daws teeb meem. Cov qhov system yog zoo ib yam thiab coincident yog hais tias nws muaj ib tug daws tab sis tus naj npawb ntawm cov kev daws yog infinite. Cov qhov system yog tsis sib xws yog tsis muaj kev daws teeb meem. Thaum peb tuaj txog ntawm hom lus teb no, qhov sib npaug txaus siab txawm tias tus nqi X yuav siv li cas.
Hauv qhov no, txhais tau li cas los ntawm qhov tsis sib xws thiab tsis sib xws?
Teb: Zoo ib yam = kab sib tshuam ntawm qhov taw tes uas sawv cev rau qhov kev daws teeb meem tshwj xeeb ntawm cov kab ke ntawm kab sib npaug hauv ob qhov sib txawv. Algebraically, yog tias, cov kab zauv sib npaug 'pab yog zoo ib yam . Tsis sib haum = kab uas yog parralel tsis sib xws.
Nws txhais li cas kom sib haum?
Ib tug yog zoo ib yam ib txwm coj tus cwj pwm zoo ib yam, muaj tus cwj pwm tib yam rau tib neeg lossis txhua yam, lossis ua tiav tib theem ntawm kev vam meej hauv ib yam dab tsi. Yog ib qhov tseeb los yog lub tswv yim zoo ib yam nrog lwm tus, lawv ua tsis sib cav sib ceg.
Pom zoo:
Koj tuaj yeem ua pov thawj li cas 2 daim duab peb sab zoo sib xws siv lub kaum sab xis sab SAS zoo sib xws postulate?
SAS Similarity Theorem hais tias yog ob sab hauv ib daim duab peb sab yog proportional rau ob sab hauv lwm daim duab peb sab thiab lub kaum sab xis nyob rau hauv ob qho tib si congruent, ces ob daim duab peb sab zoo ib yam. Ib qho kev hloov pauv zoo sib xws yog ib lossis ntau qhov kev hloov pauv tsis tu ncua ua raws li kev dilation
Vim li cas koj tig lub cim tsis sib xws thaum koj sib npaug lossis faib los ntawm qhov tsis zoo?
Thaum koj muab ob sab los ntawm tus nqi tsis zoo koj ua rau sab uas ntau dua muaj 'loj' tus lej tsis zoo, uas txhais tau tias tam sim no tsawg dua lwm sab! Qhov no yog vim li cas koj yuav tsum tig lub cim thaum twg koj muab los ntawm tus lej tsis zoo
Koj yuav ua li cas thiaj paub tias kev sib raug zoo yog qhov zoo lossis tsis zoo?
Qhov zoo correlation coefficient txhais tau hais tias raws li tus nqi ntawm ib qho kev sib txawv nce, tus nqi ntawm lwm qhov sib txawv nce; raws li ib tug txo qhov qis dua. Qhov tsis zoo correlation coefficient qhia tau hais tias raws li ib qho kev sib txawv nce, qhov txo qis, thiab vice-versa
Puas yog kab rov tav txoj kab nqes 0 lossis tsis tau txhais?
Ib yam li 'Z' (nrog nws ob kab kab rov tav) tsis zoo ib yam li 'N' (nrog nws ob txoj kab ntsug), yog li 'Xoom' txoj kab nqes (rau kab kab rov tav) tsis zoo ib yam li 'Tsis yog' txoj kab nqes (rau kab ntsug). Tus naj npawb 'zero' tshwm sim, yog li kab rov tav muaj tseeb muaj txoj kab nqes
Puas yog txoj kab ntsug yog txoj kab nqes?
Qhov 'slope' ntawm ib txoj kab ntsug. Ib txoj kab ntsug tsis tau txhais txoj kab nqes vim tias tag nrho cov ntsiab lus ntawm kab muaj tib x-coordinate. Raws li qhov tshwm sim, cov qauv siv rau txoj kab nqes muaj tus lej ntawm 0, uas ua rau txoj kab nqes tsis tau txhais