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Video: Yuav ua li cas koj paub thaum twg stretch los yog shrink ib daim duab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ntsiab Cai
- Thaum los ntawm f(x) lossis x yog muab los ntawm tus lej, cov haujlwm tuaj yeem " stretch "los yog" ntsws ” vertically lossis horizontally, feem, thaum graphed.
- Feem ntau, ib ntsug stretch yog muab los ntawm kab zauv y = bf(x) y = b f (x).
- Feem ntau, kab rov tav stretch y = f(cx) y = f (c x).
Kev sib raug zoo, koj yuav ua li cas paub thaum twg yuav ncab lossis ntsws?
Peb kuj ua tau stretch thiab ntsws daim duab ua haujlwm. Rau stretch los yog shrink daim duab nyob rau hauv cov kev taw qhia y, muab faib los yog faib cov zis los ntawm ib tug tas li. 2f (x) yog stretched nyob rau hauv y kev taw qhia los ntawm ib qho ntawm 2, thiab f (x) yog shrunk nyob rau hauv lub y kev taw qhia los ntawm ib tug yam ntawm 2 (los yog stretched los ntawm ib tug factor ntawm).
Tsis tas li ntawd, ua li cas koj ncab ib daim duab vertically? Thaum peb muab qhov ua haujlwm los ntawm qhov zoo tas li, peb tau txais cov haujlwm uas nws daim duab yog stretched los yog compressed ntsug nyob rau hauv kev sib raug zoo rau lub daim duab ntawm tus thawj function. Yog tias qhov tsis tu ncua ntau dua 1, peb tau txais a ntsug stretch ; yog tias qhov tsis tu ncua nyob nruab nrab ntawm 0 thiab 1, peb tau txais a ntsug compression.
Tom qab ntawd, koj yuav qhia li cas yog tias daim duab ncab lossis compressed?
Yog a> 1, tom qab ntawd daim duab yuav yog stretched . Yog 0<a<1 0<a<1, then the daim duab yuav yog compressed . Yog a <0, ces yuav muaj kev sib xyaw ua ke ntawm ntsug stretch los yog compression nrog kev xav txog ntsug.
Yuav ua li cas koj stretch horizontally?
Ntsiab Lus
- Thaum los ntawm f(x) lossis x yog muab faib los ntawm tus lej, cov haujlwm tuaj yeem "stretch" lossis "shrink" vertically lossis horizontally, feem, thaum kos duab.
- Feem ntau, txoj kab ntsug yog muab los ntawm kab zauv y = bf (x) y = b f (x).
- Feem ntau, kab rov tav stretch yog muab los ntawm kab zauv y = f (cx) y = f (c x).
Pom zoo:
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