Cov txheej txheem:
Video: Koj ntsuas cov kev ua haujlwm sib xyaw li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev ntsuas kev ua haujlwm sib xyaw siv cov duab kos
- Nrhiav cov tswv yim muab rau sab hauv muaj nuj nqi ntawm x-axis ntawm nws daim duab.
- Nyeem tawm cov zis ntawm sab hauv muaj nuj nqi los ntawm y-axis ntawm nws daim duab.
- Nrhiav qhov sab hauv muaj nuj nqi tso zis ntawm x-axis ntawm daim duab ntawm sab nrauv muaj nuj nqi .
Ntawm no, koj sau thiab ntsuas cov haujlwm sib xyaw li cas?
Ua ib kev ua haujlwm sib xyaw qhov twg peb muab g(x) rau hauv muaj nuj nqi f(x), peb ua tau sau nws f(g(x)). Nco ntsoov tias tsis yog tso ib qho x rau hauv qhov muaj nuj nqi , peb hloov tag nrho g(x) muaj nuj nqi . Thaum peb ua li ntawd, peb muaj f(g(x)) = (3x) + 2. Ntawm sab laug, koj yuav pom tias g muaj nuj nqi yog nyob rau hauv f muaj nuj nqi.
Ib yam li ntawd, qhov piv txwv ua haujlwm sib xyaw yog dab tsi? A kev ua haujlwm sib xyaw yog a muaj nuj nqi uas nyob ntawm lwm tus muaj nuj nqi . A composite muaj nuj nqi yog tsim thaum ib tug muaj nuj nqi yog hloov ua lwm yam muaj nuj nqi . Rau piv txwv , f(g(x)) yog kev ua haujlwm sib xyaw uas yog tsim thaum g(x) hloov rau x hauv f(x). Hauv muaj pes tsawg leeg (f ο g)(x), lub npe ntawm f ua g(x).
Tib neeg kuj nug, dab tsi yog cov kauj ruam los daws qhov ua haujlwm sib xyaw?
Ntawm no yog cov cov kauj ruam peb tuaj yeem siv los nrhiav tus muaj pes tsawg leeg ntawm ob muaj nuj nqi : Kauj ruam 1: Rewrite tus muaj pes tsawg leeg nyob rau hauv ib daim ntawv sib txawv. Piv txwv li, lub muaj pes tsawg leeg (f g)(x) yuav tsum rewritten li f(g(x)). Kauj ruam 2: Hloov txhua qhov tshwm sim ntawm x pom nyob rau sab nraud muaj nuj nqi nrog sab hauv muaj nuj nqi.
Dab tsi yog txhais los ntawm kev ua haujlwm sib xyaw?
:ib muaj nuj nqi uas nws muaj nuj nqis yog pom los ntawm ob muab muaj nuj nqi los ntawm kev thov ib qho muaj nuj nqi mus rau ib qho kev hloov pauv ywj pheej thiab tom qab ntawd siv qhov thib ob muaj nuj nqi rau qhov tshwm sim thiab nws tus thawj tswj hwm muaj cov txiaj ntsig ntawm qhov hloov pauv ywj pheej uas qhov txiaj ntsig tau los ntawm thawj muaj nuj nqi lus dag nyob rau hauv lub thib ob.
Pom zoo:
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