Cov txheej txheem:

Koj ua qhov sib npaug li cas nrog ob lub ntsiab lus?
Koj ua qhov sib npaug li cas nrog ob lub ntsiab lus?

Video: Koj ua qhov sib npaug li cas nrog ob lub ntsiab lus?

Video: Koj ua qhov sib npaug li cas nrog ob lub ntsiab lus?
Video: Npau Suav li no Txhob coj mus tham qhia luag lwm tus 2024, Kaum ib hlis
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Kev sib npaug ntawm 2 cov ntsiab lus siv Slope Intercept Form

  1. Xam qhov nqes hav los ntawm 2 ntsiab lus .
  2. Hloov ib qho taw tes rau hauv kev sib npaug . Koj tuaj yeem siv (3, 7) lossis (5, 11)
  3. daws rau b, uas yog y-intercept ntawm kab.
  4. Hloov b, -1, rau hauv kev sib npaug los ntawm kauj ruam 2 .

Tom qab ntawd, koj yuav ua li cas thiaj nrhiav tau qhov sib npaug ntawm ib qho kev nthuav qhia tau muab ob lub ntsiab lus?

Yog koj muaj ob ntsiab lus , (x1, tus y1) thiab (x2, tus y2), koj tuaj yeem txhais qhov exponential muaj nuj nqi uas dhau los ntawm cov no cov ntsiab lus los ntawm kev hloov lawv nyob rau hauv lub kev sib npaug y = abx thiab daws rau a thiab b. Feem ntau, koj yuav tsum daws cov khub no kev sib npaug :ua y1 = abx 1 thiab y2 = abx 2,.

Qhov thib ob, dab tsi yog qhov sib npaug rau kev ua haujlwm exponential? Exponential muaj nuj nqi muaj daim ntawv f(x) = bx, qhov twg b> 0 thiab b ≠ 1. Ib yam li hauv ib qho twg exponential qhia, b yog hu ua lub hauv paus thiab x yog hu ua tus exponent. Ib qho piv txwv ntawm ib exponential muaj nuj nqi yog kev loj hlob ntawm cov kab mob. Qee cov kab mob ob zaug txhua teev.

Tom qab ntawd, ib tus tuaj yeem nug, A thiab B yog dab tsi hauv qhov kev nthuav tawm?

ua ib. exponential muaj nuj nqi qhov twg " b ” yog nws qhov kev hloov pauv (lossis qhov tsis tu ncua), tus exponent. "x" yog qhov sib txawv ntawm tus kheej (los yog cov tswv yim ntawm cov muaj nuj nqi ), tus coefficient "a" yog. hu ua tus nqi pib ntawm tus muaj nuj nqi (los yog y-intercept), thiab "f(x)" sawv cev rau qhov sib txawv ntawm qhov sib txawv (los yog cov zis ntawm muaj nuj nqi ).

E txhais li cas hauv lej?

e (Euler's Number) Tus lej e yog ib tus lej tseem ceeb tshaj plaws hauv lej . Nws feem ntau hu ua Euler tus lej tom qab Leonhard Euler (hais tias "Oiler"). e yog tus lej irrational (nws tsis tuaj yeem sau ua ib feem yooj yim).

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