Cov txheej txheem:
Video: Yuav ua li cas koj nrhiav tau cov tshuaj extraneous?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Los ntawm Tshuab xam zauv:
- Teem lub equation kom sib npaug zos. (Qhov no xaus yog √x + 4 - x + 2 = 0)
- Txuas qhov no rau hauv y = khawm ntawm koj lub tshuab xam zauv TI-83/84.
- Nrhiav tus nqi ntawm txhua tus ntawm koj kev daws teeb meem (mus rau 2nd-> Calc-> Tus Nqi thiab sau koj li daws rau x)
- Koj yuav tsum tau txais xoom raws li cov lus teb rau txhua tus ntawm lawv.
Hauv qhov no, dab tsi yog qhov kev daws teeb meem ntawm kev sib npaug?
Hauv lej, ib tshuaj extraneous (los yog spurious daws ) yog a daws , zoo li ntawd rau ib kev sib npaug , uas tshwm sim los ntawm cov txheej txheem ntawm daws qhov teeb meem tab sis tsis muaj tseeb daws rau qhov teeb meem.
Tsis tas li ntawd, vim li cas thiaj muaj kev daws teeb meem ntxiv? Yog vim li cas muaj kev daws teeb meem ntxiv yog vim qee qhov kev ua haujlwm tsim 'ntxiv' cov lus teb, thiab qee zaum, cov haujlwm no yog ib feem ntawm txoj hauv kev los daws qhov teeb meem. Thaum peb tau txais cov lus teb 'ntxiv', lawv feem ntau tsis ua haujlwm thaum peb sim ntsaws lawv rov qab rau hauv qhov teeb meem qub.
Ib yam li ntawd, nws raug nug, ua li cas koj thiaj li tau txais cov tshuaj extraneous?
Ib tshuaj extraneous yog lub hauv paus ntawm kev hloov pauv uas tsis yog lub hauv paus ntawm qhov kev sib npaug qub vim nws tau raug cais tawm ntawm qhov sib npaug ntawm qhov qub. Piv txwv 1: daws rau x, 1x − 2 + 1x + 2 = 4(x − 2)(x + 2).
Cov tshuaj extraneous puas tuaj yeem ua rau tsis zoo?
Nws yog sab nraum lub domain, tsis yog a daws , teb tsis ncaj ncees lawm. External kev daws teeb meem tsis tas yuav nyob sab nraud. Tab sis lawv ua tau tshwm li ntxiv kev daws teeb meem Thaum peb square ob sab ntawm ib qho kev sib npaug, vim hais tias thaum peb square ib qho kev sib npaug, peb yuav tau txais cov txiaj ntsig tib yam seb qhov kev sib npaug qub yog qhov zoo lossis tsis zoo.
Pom zoo:
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