Video: Yuav ua li cas koj nrhiav tau undefined qhov tseem ceeb nyob rau hauv rational expressions?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A rational qhia yog tsis tau txhais thaum tus denominator sib npaug zos rau xoom. Yuav nrhiav tau tus nqi qe ua a rational expression undefined , teem lub denominator sib npaug zos rau xoom thiab daws qhov tshwm sim sib npaug. Example: 0 7 2 3 x x − tsis tau txhais vim lub zero yog nyob rau hauv lub denominator.
Hais txog qhov no, koj yuav ua li cas thiaj nrhiav tau cov lus hais tsis meej?
Peb kawm tau tias tus lej kev qhia yog tsis tau txhais thaum tsis muaj lus teb lossis thaum twg koj tau faib los ntawm xoom. Peb yuav tau faib los ntawm xoom rau cov zauv cov lus qhia nrog cov variables thiab tus denominator. Rau nrhiav cov ntsiab lus uas tus lej kev qhia yog tsis tau txhais , peb teem lub denominator sib npaug zos rau xoom thiab daws.
Tom qab ntawd, lo lus nug yog, dab tsi yog qhov kev qhia tsis meej? Tsis tau txhais . Ib kev qhia nyob rau hauv lej uas tsis muaj lub ntsiab lus thiab yog li uas tsis raug muab txhais. Piv txwv li, faib los ntawm xoom yog tsis tau txhais hauv daim teb ntawm cov lej tiag. SAIB XYUAS: Tsis meej pem, Complex Infinity, Qhia Infinity, Division los ntawm Zero, Mob-Defined, Indeterminate, Zoo-Defined.
Tsis tas li ntawd, koj yuav ua li cas thiaj nrhiav tau lub ntsiab lus ntawm cov lus qhia muaj nuj nqis?
Cov domain ntawm rational expression yog tag nrho cov lej tiag tsuas yog rau cov uas ua tus denominator sib npaug rau xoom. Vim lub zeros ntawm tus denominator yog 0 000 thiab − 1 -1 −1minus, 1, sau npe yuav tshem tawm cov nqi no. Cov sau npe yog txhua tus lej tiag tsuas yog 0 0 00 thiab − 1 -1 −1minus, 1.
Puas yog 0 dhau ib yam dab tsi tsis tau txhais?
Txij li txhua tus lej muab los ntawm zero yog zero , kev qhia 00 kuj yog tsis tau txhais ; thaum nws yog daim ntawv txwv, nws yog ib daim ntawv indeterminate.
Pom zoo:
Yuav ua li cas koj yuav nrhiav tau nyob ze qhov kawg yog nws sab qaum teb ncej nyob?
Teb. Qhov chaw ntawm tus ncej ntawm li hlau nplaum tuaj yeem txiav txim siab los ntawm kev ncua nws dawb. Ib qho kev txwv tsis pub pub dawb bar hlau nplaum ib txwm taw qhia rau sab qaum teb thiab sab qab teb. Qhov kawg uas taw tes rau sab qaum teb yog tus ncej qaum teb ntawm cov hlau nplaum thaum kawg uas cov ntsiab lus mus rau sab qab teb yog tus ncej sab qab teb ntawm cov hlau nplaum
Yuav ua li cas koj nrhiav tau tus naj npawb ntawm molecules nyob rau hauv ib tug tshuaj formula?
Multiply Moles los ntawm Avogadro Constant Muab cov naj npawb ntawm moles los ntawm Avogadro tas li, 6.022 x 10^23, los xam cov lej ntawm cov molecules hauv koj cov qauv
Yuav ua li cas koj nrhiav tau tus naj npawb ntawm electrons nyob rau hauv ib tug uncharged atom?
Tus naj npawb atomic sawv cev rau tus naj npawb ntawm protons hauv atom lub nucleus. Hauv ib qho atom uas tsis tau them nyiaj, tus naj npawb ntawm cov protons ib txwm sib npaug ntawm cov electrons. Piv txwv li, carbon atoms suav nrog rau protons thiab rau electrons, yog li cov pa roj carbon monoxide yog 6
Yuav ua li cas koj thiaj nrhiav tau tus nqi tseem ceeb ntawm kev ntseeg siab ib ntus?
Piv txwv lo lus nug: Nrhiav tus nqi tseem ceeb rau 90% kev ntseeg siab (Two-Tailed Test). Kauj Ruam 1: Tshem tawm qhov kev ntseeg siab ntawm 100% kom pom qib α: 100% - 90% = 10%. Kauj ruam 2: Hloov Kauj Ruam 1 mus rau tus lej: 10% = 0.10. Kauj Ruam 3: Faib Kauj Ruam 2 los ntawm 2 (qhov no hu ua "α/2")
Yuav ua li cas koj nrhiav tau qhov chaw ntawm lub voj voog nyob rau hauv ib tug conic seem?
Tus nqi ntawm r yog hu ua 'radius' ntawm lub voj voog, thiab qhov taw tes (h, k) hu ua 'center' ntawm lub voj voog. (h, k) = (0, 0), ces qhov sib npaug simplifiesto x2 + y2 = r2