Qhov ntau txhais tau li cas hauv Precalc?
Qhov ntau txhais tau li cas hauv Precalc?

Video: Qhov ntau txhais tau li cas hauv Precalc?

Video: Qhov ntau txhais tau li cas hauv Precalc?
Video: Npau Suav Tuag Txhais Tau Li cas? 2024, Kaum ib hlis
Anonim

Hauv lej, the ntau ntau ntawm ib tug tswv cuab ntawm ib tug multiset yog tus naj npawb ntawm lub sij hawm nws tshwm nyob rau hauv lub multiset. Piv txwv li, tus naj npawb ntawm lub sij hawm ib tug muab polynomial sib npaug muaj ib lub hauv paus ntawm ib tug muab point yog tus ntau ntau ntawm lub hauv paus.

Ib yam li ntawd, koj tuaj yeem nug, nws txhais li cas kom muaj qhov sib npaug ntawm 2?

Qhov xwm txheej yog rov hais dua, tias yog , cov factor (x- 2 ) tshwm ob zaug. Tus naj npawb ntawm lub sij hawm ib qho tseem ceeb tshwm sim nyob rau hauv daim ntawv factored ntawm qhov sib npaug ntawm ib tug polynomial yog hu ua ntau ntau . Qhov zero cuam tshuam nrog qhov xwm txheej no, x = 2 , muaj multiplicity 2 vim (x- 2 ) tshwm sim ob zaug.

Kuj Paub, qhov ntau ntawm qhov xoom txhais li cas? A xoom muaj ib ntau ntau Piv txwv li, lub quadratic (x + 3)(x - 2) muaj qhov xoom x = -3 thiab x = 2, txhua qhov tshwm sim ib zaug.

Hauv qhov no, qhov sib npaug ntawm 9 yog dab tsi?

Ntau yam hauv Proton NMR

# ntawm kab ratio ntawm kab lub sij hawm rau ncov
6 1:5:10:10:5:1 sextet
7 1:6:15:20:15:6:1 septet
8 1:7:21:35:35:21:7:1 octet ua
9 1:8:28:56:70:56:28:8:1 tsis muaj

Yuav ua li cas koj thiaj paub yog hais tias ib tug multiplicity yog khib los yog txawm?

Yog tus ntau ntau yog khib , daim duab yuav hla tus x-axis ntawm tus xoom ntawd. Ntawd yog, nws yuav hloov sab, lossis nyob rau sab nraud ntawm x-axis. Yog tus multiplicity yog txawm , daim duab yuav kov x-axis ntawm tus xoom ntawd. Ntawd yog, nws yuav nyob ntawm tib sab ntawm lub axis.

Pom zoo: