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Yuav ua li cas koj nrhiav tau kab rov tav stretch?
Yuav ua li cas koj nrhiav tau kab rov tav stretch?

Video: Yuav ua li cas koj nrhiav tau kab rov tav stretch?

Video: Yuav ua li cas koj nrhiav tau kab rov tav stretch?
Video: 8 yam tsis txhob ua thaum sib deev tag tsis li yuav phom sij txog lub neej txoj sia. 2024, Kaum ib hlis
Anonim

Yog tias b> 1, daim duab stretches nrog rau y-axis, los yog vertically. Yog hais tias b <1, daim duab shrinks nrog rau y -axis. Feem ntau, a kab rov tav stretch y = f(cx) y = f (c x).

Raws li txoj cai, kab rov tav stretch yog dab tsi?

A kab rov tav stretching yog cov ncab ntawm daim duab deb ntawm y-axis. A kab rov tav compression (los yog shrinking) yog qhov nyem ntawm daim duab mus rau y-axis. • Yog tias k > 1, daim duab ntawm y = f (k•x) yog cov duab ntawm f (x) kab rov tav shrunk (los yog compressed) los ntawm kev faib txhua qhov ntawm nws x-coordinates los ntawm k.

Tsis tas li ntawd, kab rov tav txhais li cas hauv lej? Hauv kev ua haujlwm graphing, a kab rov tav txhais yog ib qho kev hloov pauv uas ua rau ib daim duab sib npaug rau kev hloov lub hauv paus graph sab laug lossis sab xis nyob rau hauv cov kev taw qhia ntawm x-axis. Ib daim duab yog txhais k ua units kab rov tav los ntawm kev txav txhua qhov taw tes ntawm daim duab k units kab rov tav.

Kuj Paub, koj sau kab rov tav li cas?

Ntsiab Cai

  1. 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.
  2. Feem ntau, txoj kab ntsug yog muab los ntawm kab zauv y = bf (x) y = b f (x).
  3. Feem ntau, kab rov tav stretch yog muab los ntawm kab zauv y = f (cx) y = f (c x).

Dab tsi yog 4 hom kev hloov pauv?

Plaub hom kev hloov pauv uas koj yuav ntsib thaum lub ntsiab lus no yog:

  • Kev sib hloov.
  • Kev xav.
  • Kev txhais lus.
  • Enlargement/Re-sizing.

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