2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Yuav kom nrhiav tau thaum muaj nuj nqi yog concave, koj yuav tsum xub coj 2nd derivative 2nd derivative Qhov thib ob derivative ntawm ib tug muaj nuj nqi f siv tau los txiav txim qhov concavity ntawm daim duab f. Ib qho kev ua haujlwm uas nws qhov thib ob yog qhov zoo yuav ua rau concave (tseem hu ua convex), txhais tau hais tias cov kab tangent yuav pw hauv qab daim duab ntawm txoj haujlwm. https://en.wikipedia.org › wiki › Second_derivative
Second derivative - Wikipedia
tom qab ntawd muab nws sib npaug rau 0, thiab tom qab ntawd nrhiav ntawm qhov twg xoom qhov txiaj ntsig qhov kev ua haujlwm tsis zoo. Tam sim no sim ntsuas qhov tseem ceeb ntawm txhua sab ntawm cov no kom pom thaum lub luag haujlwm tsis zoo, thiab yog li txo qis.
Koj pom qhov concavity ntawm daim duab li cas?
Peb tuaj yeem xam qhov thib ob derivative los txiav txim qhov concavity ntawm txoj haujlwm nkhaus ntawm txhua qhov taw tes
- Xau qhov thib ob derivative.
- Hloov tus nqi ntawm x.
- Yog f "(x) > 0, daim duab yog concave upward ntawm tus nqi ntawm x.
- Yog f "(x)=0, daim duab yuav muaj qhov taw tes ntawm kev cuam tshuam ntawm tus nqi ntawm x.
Koj pom qhov ua haujlwm concave li cas?
Yuav kom paub tias nws yog concave los yog convex, saib qhov thib ob derivative. Yog tias qhov tshwm sim zoo, nws yog convex. Yog hais tias tsis zoo, ces nws yog concave. Txhawm rau nrhiav qhov thib ob derivative, peb rov ua cov txheej txheem siv raws li peb cov lus qhia.
Yuav ua li cas thiaj nrhiav tau txoj kab sib dhos?
Peb tuaj yeem nrhiav tauconcavity ntawm ib tug muaj nuj nqi los ntawm nrhiav nws ob derivative (f''(x)) thiab qhov twg nws yog sib npaug rau xoom. Cia peb ua li ntawd! Yog li qhov no qhia peb tias cov haujlwm linear yuav tsum nkhaus ntawm txhua qhov chaw. Paub tias daim duab ntawm kev ua haujlwm yog ib txoj kab ncaj nraim, qhov no tsis tsim nyog, puas yog?
Yuav ua li cas koj thiaj pom qhov tsis sib haum xeeb?
Yuav Ua Li Cas Pom Qhov Nruab Nrab ntawm Concavity thiab Inflection Points
- Nrhiav qhov thib ob derivative ntawm f.
- Teem thib ob derivative sib npaug rau xoom thiab daws.
- Txiav txim siab seb qhov thib ob derivative tsis tau txhais rau ib qho x-tus nqi. …
- Tshaj cov lej no ntawm ib kab ntawm tus lej thiab sim cov cheeb tsam nrog tus lej thib ob.
Pom zoo:
Thaum twg thiaj nrhiav tau qhov sib txawv electronegativity?
Thaum ob lub atoms sib koom ua ke, qhov sib txawv ntawm lawv cov electronegativities tuaj yeem qhia koj txog qhov zoo ntawm lawv daim ntawv cog lus. Tshem tawm qhov me me electronegativity los ntawm qhov loj dua kom pom qhov txawv. Vim li cas peb yuav tsum nkag siab qhov sib txawv ntawm electronegativity?
Yuav ua li cas thiaj nrhiav tau tus lej ntawm qhov zoo sib faib?
Feem ntau, yog tias koj muaj qhov tseem ceeb ntawm tus lej n, tom qab ntawd txhawm rau suav pes tsawg tus divisors nws muaj, koj muab tag nrho cov exponents hauv qhov factorization, ntxiv 1 rau txhua, thiab tom qab ntawd muab cov "exponents + 1"
Puas yog txawv txawv thiab txawv txawv lossis cov lus sib txawv?
Cov lus txawv txawv thiab txawv txawv yog synonyms, tab sis txawv ntawm nuance. Tshwj xeeb, alienate tej zaum yuav los yog tsis qhia kev sib cais tab sis ib txwm hais txog kev poob kev hlub lossis kev txaus siab. Dab tsi yog lub ntsiab lus ntawm alienate?
Vim li cas thiaj daws tau qhov sib npaug sib txawv?
Differential Equations tuaj yeem piav qhia yuav ua li cas cov pej xeem hloov, qhov kub npaum li cas txav, cov springs vibrates li cas, cov khoom siv hluav taws xob zoo li cas thiab ntau ntxiv. Lawv yog ib txoj hauv kev zoo los piav ntau yam hauv lub qab ntuj khwb.
Yuav ua li cas thiaj nrhiav tau cov ntawv sib txawv?
Yuav kom paub qhov sib txawv hauv ib zaj paj huam, nrhiav cov khub lossis pab pawg ntawm cov lus uas pib nrog tib lub suab nrov. Cov lus yuav pib nrog cov ntawv zoo ib yam lossis nrog cov ntawv sib txuas uas tsim cov suab zoo sib xws. Piv txwv li, "
