Cov txheej txheem:
Video: Koj sau li cas tus nqi tsis sib xws?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Muaj ob txoj kev daws teeb meem x = a thiab x = -a vim tias ob tus lej nyob ntawm qhov deb ntawm 0. Koj pib los ntawm kev ua rau ob qhov sib npaug sib cais thiab tom qab ntawd daws lawv cais. Ib tus nqi kiag kev sib npaug tsis muaj kev daws teeb meem yog tias tus tus nqi kiag kev qhia sib npaug ntawm tus lej tsis zoo txij li ib tus nqi kiag yeej tsis tuaj yeem ua tsis zoo.
Ib yam li ntawd, tib neeg nug, dab tsi yog cov cai rau tus nqi tiag?
Thaum peb muab lub tus nqi kiag ntawm tus lej, peb ib txwm xaus nrog tus lej zoo (lossis xoom). Txawm hais tias qhov kev tawm tswv yim yog qhov zoo lossis tsis zoo (lossis xoom), cov zis yog ib txwm zoo (lossis xoom). Piv txwv li, | 3 | = 3, thiab | –3 | = 3 too.
Tsis tas li ntawd, koj yuav ua li cas paub yog tias tus nqi tsis sib xws yog txhua tus lej tiag? Cov tus nqi kiag ntawm ib tus lej yog xoom (0) lossis zoo. Nws ua rau kev nkag siab uas nws yuav tsum yeej ib txwm loj dua ib yam tsis zoo tus lej . Lo lus teb rau rooj plaub no yeej ib txwm txhua tus lej tiag.
Kuj kom paub, koj ua li cas ntsuas qhov tsis sib xws?
Yuav ua li cas kos ib kab tsis sib xws
- Rearrange qhov sib npaug kom "y" nyob rau sab laug thiab txhua yam nyob rau sab xis.
- Teem lub "y = kab" (ua rau nws yog ib txoj kab ruaj khov rau y≤ lossis y≥, thiab ib kab dashed rau y)
- Duab ntxoov ntxoo saum kab rau "ntau dua" (y> lossis y≥) lossis hauv qab kab rau "tsawg dua" (y< lossis y≤).
Ib qho piv txwv ntawm kev tsis sib xws yog dab tsi?
Xav txog cov piv txwv ntawm kev tsis sib xws : x < 5 and x ≧ −1. Daim duab ntawm txhua tus neeg kev tsis sib xws yog qhia nyob rau hauv cov xim. Txij li lo lus thiab koom nrog ob kev tsis sib xws , kev daws yog qhov sib tshooj ntawm ob txoj kev daws teeb meem. Qhov no yog qhov uas ob nqe lus no muaj tseeb tib lub sijhawm.
Pom zoo:
Puas yog ob txoj kab sib luag zoo sib xws lossis tsis sib xws?
Yog tias ob qhov sib npaug piav txog kab sib luag, thiab yog li cov kab uas tsis sib tshuam, qhov system yog ywj siab thiab tsis sib haum. Yog hais tias ob qhov sib npaug piav txog tib kab, thiab yog li cov kab uas hla tus lej tsis kawg, lub kaw lus yog nyob ntawm thiab sib xws
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
Koj yuav txiav txim siab li cas yog tias qhov tsis sib xws tsis muaj kev daws teeb meem?
Cais tawm tus nqi tseeb ntawm sab laug ntawm qhov tsis sib xws. Yog tias tus lej ntawm sab nraud ntawm qhov tsis sib xws yog qhov tsis zoo, koj qhov kev sib npaug tsis muaj kev daws teeb meem lossis tag nrho cov lej tiag tiag li kev daws teeb meem. Siv cov cim ntawm txhua sab ntawm koj qhov tsis sib xws los txiav txim siab qhov twg ntawm cov xwm txheej no tuav
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
Yuav ua li cas koj thiaj paub yog tias tus nqi tsis sib xws tsis muaj kev daws teeb meem?
Okay, yog tias qhov tseem ceeb tshaj plaws yeej ib txwm zoo lossis xoom tsis muaj txoj hauv kev uas lawv tuaj yeem tsawg dua lossis sib npaug rau tus lej tsis zoo. Yog li ntawd, tsis muaj kev daws teeb meem rau ob qho no. Hauv qhov no yog tias tus nqi tiag tiag yog qhov zoo lossis xoom ces nws yuav nco ntsoov ntau dua lossis sib npaug rau tus lej tsis zoo