Nrhiav Cov Nqis Tshaj Tawm ntawm Kev Tshaj Tawm Txog Kev Pom Zoo
Qhia tus denominator ntawm rational expression. Nrhiav tus nqi uas ua rau txhua qhov sib npaug zero. Cov no yog excluded qhov tseem ceeb ntawm lub domain ntawm lub rational qhia.
Ib yam li ntawd, Koj ua li cas thiaj nrhiav tau cov txiaj ntsig tsis suav nrog ntawm daim duab?
Koj txiav txim siab li cas tus nqi S tsis suav nrog uas yuav ua rau cov lus qhia tsis tau txhais? Ib qho lus qhia tsis meej yog tsis tau txhais thaum tus denominator sib npaug rau xoom. Txhawm rau nrhiav cov txiaj ntsig uas ua rau muaj kev xav tsis meej, teem lub denominator sib npaug rau xoom thiab daws qhov tshwm sim kev sib npaug. Piv txwv li: 0 7 2 3 xx − Yog undefined vim tus xoom nyob rau hauv tus denominator.
Koj tuaj yeem txiav txim siab li cas cov txiaj ntsig tsis suav nrog hauv cov khoom lag luam lossis cov khoom siv ntawm ob qhov kev xav tau? ib yam khoom los yog quotient ntawm ob lub ntsiab lus rational? Koj tuaj yeem sib faib thiab faib cov lus qhia muaj txiaj ntsig zoo ib yam li koj sib faib thiab faib cov feem. Qhov tseem ceeb uas ua rau tus denominator ntawm ib qho kev qhia xoom yog excluded nqi.
Thib ob, tus nqi tsis suav nrog 0 1 yog dab tsi? Tus nqi tsis suav nrog qhov kev qhia yog tus nqi ntawm qhov sib txawv uas qhov kev qhia tsis tau txhais. Piv txwv li, ib feem tsis tau txhais thaum nws tus lej yog xoom. Yog li qhov tsis suav nrog tus nqi ntawm feem 1x yog x = 0 .
Koj yuav paub li cas yog tus lej suav nrog lossis tsis suav nrog?
Cov ntawv sau yuav tsis meej pem me ntsis, tab sis tsuas yog nco ntsoov tias square brackets txhais tau tias qhov kawg taw tes suav nrog, thiab round brackets txhais tau tias nws tsis suav nrog. Yog hais tias ob qho tag nrho cov ntsiab lus suav nrog lub ncua sij hawm tau hais tias yuav raug kaw, yog tias ob qho tib si tsis suav nrog nws tau hais tias yuav qhib.
ces Cov nqe lus twg yog qhov zoo tshaj plaws piav qhia txog qhov tseem ceeb ntawm kev qhia txog kev xav? Tus naj npawb ntawm cov txiaj ntsig tsis suav nrog cov lus qhia rational tsis tuaj yeem tshaj qhov sib txawv ntawm cov degrees ntawm tus lej thiab tus lej.
Dab tsi yog qhov tsis suav nrog 1? Dab tsi yog qhov Excluded Value? Excluded values tsuas yog hais tias: qhov tseem ceeb uas raug cais tawm, los yog tawm mus. Cov no yog cov nqi uas yuav ua kom tus denominator ntawm rational qhia sib npaug rau 0. Nco ntsoov, koj tsis raug tso cai faib los ntawm 0, yog li cov txiaj ntsig no tseem ceeb los txheeb xyuas thiab cais tawm thaum daws.
Dab tsi yog qhov hloov pauv yuav tsum suav nrog thiab tsis suav nrog?
Cov txheej txheem suav nrog thiab cais tawm yuav suav nrog yam xws li hnub nyoog, poj niam txiv neej, haiv neeg, haiv neeg, hom thiab theem ntawm tus kab mob, tus neeg kawm keeb kwm kev kho mob yav dhau los, thiab qhov muaj lossis tsis tuaj (xws li nyob rau hauv cov ntaub ntawv ntawm "kev noj qab haus huv" lossis "tswj") ntawm lwm yam kev kho mob, kev puas siab puas ntsws, lossis kev xav.
Koj pom kev txwv li cas thaum faib cov lus qhia txog kev xav? Cov txiaj ntsig uas muab tus nqi ntawm 0 hauv tus lej rau txhua qhov kev qhia yog cov kev txwv. Yuav kom faib cov lus qhia rational, muab tus zauv los ntawm qhov sib npaug ntawm tus divisor. Cov kev txwv rau lub npe ntawm ib yam khoom muaj xws li cov kev txwv rau tus sau ntawm txhua yam.
Dab tsi yog qhov tsis suav nrog tus nqi ntawm kev muaj nuj nqis?
Nyob rau hauv ib tug rational muaj nuj nqi, ib tug excluded tus nqi yog tej x -value uas ua rau muaj nuj nqi muaj nuj nqi y undefined. Yog li, cov txiaj ntsig no yuav tsum raug cais tawm ntawm lub luag haujlwm ntawm lub luag haujlwm. Piv txwv li, tus nqi tsis suav nrog y = 2x + 3 yog -3. Ntawd yog, thaum x = −3, tus nqi ntawm y yog undefined.
Yuav ua li cas koj txiav txim siab excluded qhov tseem ceeb uas yuav ua rau cov lus qhia undefined?
Puas txhais tau tias suav nrog lossis cais tawm?
Brackets txhais tau tias muaj, kab lus txhais tau tias cais tawm. (4, 27] txhais tau tias tsis suav nrog 4; suav nrog 27.
Puas yog 0 tus lej tiag?
Cov lej tiag tiag yog, qhov tseeb, zoo nkauj npaum li cas tus lej uas koj tuaj yeem xav txog. … Cov lej tiag tuaj yeem yog qhov zoo lossis tsis zoo, thiab suav nrog tus lej xoom. Lawv raug hu ua tus lej tiag vim tias lawv tsis xav txog, uas yog qhov sib txawv ntawm cov lej.
Dab tsi ua rau kev daws teeb meem rau kev sib npaug sib npaug kom muaj kev sib txawv? Dab tsi ua rau kev daws teeb meem rau kev sib npaug sib npaug los ua ib qho kev daws teeb meem? Yog tias qhov kev daws teeb meem ua rau xoom thaum hloov mus rau hauv tus lej ntawm qhov sib npaug, kev daws yog extraneous.
Cov kab lus sib npaug yog dab tsi? Ob kab lus sib npaug yog tias lawv tuaj yeem ua kom yooj yim rau tib qhov kev qhia thib peb los yog ib qho ntawm cov kab lus tuaj yeem sau tau zoo li lwm tus. Tsis tas li ntawd, koj tuaj yeem txiav txim siab yog tias ob qho kev qhia sib npaug thaum cov txiaj ntsig tau hloov pauv rau qhov sib txawv thiab ob qho tib si tuaj txog ntawm tib lo lus teb.
Dab tsi yog hauv daim ntawv yooj yim?
Ib feem yog nyob rau hauv daim ntawv yooj yim tshaj plaws yog tias sab saum toj thiab hauv qab tsis muaj lwm yam uas tsis yog 1. Hauv lwm lo lus, koj tsis tuaj yeem faib rau saum thiab hauv qab ib qho ntxiv thiab kom lawv tseem yog tus lej tag nrho. Koj tuaj yeem hnov cov ntawv yooj yim hu ua "cov ntsiab lus qis tshaj". yog nyob rau hauv daim ntawv yooj yim.
Tus nqi tsis suav nrog 3x yog dab tsi? ⇒3x = 1⇒x = 13 yog tus nqi tsis suav nrog.
Excluding txhais li cas hauv lej?
Faj seeb: Excluded values is simply that: values that are excluded, or sab laug. Cov no yog cov txiaj ntsig uas yuav ua rau tus denominator ntawm ib qho kev qhia muaj nuj nqis sib npaug rau 0. Nco ntsoov, koj tsis raug tso cai faib los ntawm 0, yog li cov txiaj ntsig no tseem ceeb rau kev txheeb xyuas thiab cais tawm thaum daws.
Dab tsi yuav tsum suav nrog cais tawm hauv qhov kev txwv ntawm txoj kev tshawb fawb? Lub delimitations ntawm ib txoj kev tshawb no yog cov yam thiab zog tsis suav nrog hauv kev tshawb nrhiav. Hauv lwm lo lus, lawv yog cov ciam teb uas tus kws tshawb fawb tau teeb tsa nyob rau hauv cov nqe lus ntawm kev kawm ntev, cov pej xeem loj thiab hom neeg koom, thiab lwm yam.
Tsis muaj kev cais tawm txhais li cas?
me me los yog tsis muaj peev xwm ntawm ib yam dab tsi tshwm sim.
Dab tsi yog cov variables suav nrog? Quantitative variables
Hom kev hloov pauv | Cov ntaub ntawv sawv cev li cas? |
---|---|
Discrete variables (aka integer variables) | Kev suav ntawm tus kheej cov khoom lossis tus nqi. |
Continuous variables (aka ratio variables) | Kev ntsuas qhov ntsuas tas mus li lossis tsis muaj qhov kawg. |
Nov 21, 2019