The graph of y=x2. Thaum dy dx=0, txoj kab nqes ntawm qhov tangent mus rau qhov nkhaus yog xoom thiab yog li kab rov tav. Qhov nkhaus tau hais tias muaj qhov chaw nyob ruaj khov ntawm qhov taw tes uas dy dx=0. … Lawv yog cov txheeb ze lossis cov maxima hauv zos, cov txheeb ze lossis lub zos minima thiab cov ntsiab lus kab rov tav ntawm inflection.
Tus piv txwv nyob ruaj khov yog dab tsi?
Peb paub tias ntawm cov ntsiab lus nyob ruaj khov, dy/dx=0 (vim qhov gradient yog xoom ntawm cov ntsiab lus nyob ruaj khov). Los ntawm kev sib txawv, peb tau txais: dy/dx=2x. Yog li ntawd, cov ntsiab lus nyob ruaj ruaj ntawm daim duab no tshwm sim thaum 2x=0, uas yog thaum x=0. Thaum x=0, y=0, yog li cov kev tswj hwm ntawm qhov chaw nres tsheb yog (0, 0).
Yuav ua li cas paub yog tias nws yog qhov chaw nres tsheb?
Ib qho chaw ruaj khov ntawm qhov ua haujlwm f(x) yog a taw tes qhov twg cov txiaj ntsig ntawm f(x) yog sib npaug rau 0Cov ntsiab lus no yog hu ua "nyob ruaj ruaj" vim hais tias ntawm cov ntsiab lus no qhov kev ua haujlwm tsis yog nce lossis txo qis. Graphically, qhov no sib raug rau cov ntsiab lus ntawm daim duab f(x) qhov twg qhov tangent rau qhov nkhaus yog kab kab rov tav.
Qhov chaw nres tsheb yog dab tsi?
Ib qhov chaw ruaj khov ntawm CO2 yog txhua qhov chaw uas yog ib qho chaw tso tawm, xws li fossil fuel power plant, oil refineries, industrial process plant and other heavy industrial sources.
Koj pom qhov chaw nyob ruaj khov ntawm daim duab li cas?
Ib qho chaw nyob ruaj khov tuaj yeem yog qhov hloov pauv lossis qhov chaw nyob ruaj khov ntawm kev ua kom muaj zog. Sib txawv lub sij hawm akxk hauv polynomial muab kakxk-1. Yog li yog hais tias ib tug polynomial f (x) muaj degree n, ces nws derivative f′(x) muaj degree n−1. Txhawm rau nrhiav cov ntsiab lus nyob ruaj khov ntawm y=f (x), peb yuav tsum daws qhov sib npaug ntawm qhov sib npaug f′(x)=0 ntawm degree n−1
