Video: Vim li cas koj thiaj siv cov ntawv sau ua haujlwm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Function notation yog ib txoj kev sau muaj nuj nqi uas yog yooj yim nyeem thiab to taub. Muaj nuj nqi muaj kev vam meej thiab ywj pheej, thiab thaum twg peb siv cov ntawv sau ua haujlwm lub ywj pheej variable yog feem ntau x, thiab qhov sib txawv ntawm qhov sib txawv yog F(x). Function notation yog ib txoj kev sib txawv ntawm kev sau kev sib raug zoo, ok.
Kuj nug, dab tsi yog lub ntsiab lus ntawm kev sau ntawv?
Function notation tuaj yeem siv los tsim cov ntsiab lus ntawm ib daim duab lossis nrhiav tus nqi ntawm qhov muaj nuj nqi rau tus nqi tshwj xeeb ntawm x. Nws yog ib qho yooj yim, shorthand txoj kev kawm dab tsi a muaj nuj nqi qhov tseem ceeb yog rau qhov sib txawv ntawm qhov sib txawv ntawm tus kheej x.
Ib yam li ntawd, f3 txhais li cas? f (x) hauv paus txhais tau tias y,ua f '(x) txhais tau tias ua/dx. Tus x tuaj yeem muaj tus nqi, yog li piv txwv li, f (x) = 2x + 1, then f (1) = 3.
Tsis tas li ntawd, qhov kev sau ua haujlwm txhais tau li cas?
Function notation yog txoj kev a muaj nuj nqi yog sau. Nws yog txhais tau tias yog ib qho kev qhia meej ntawm kev muab cov ntaub ntawv hais txog cov muaj nuj nqi tsis muaj lus piav qhia ntev heev. Qhov f (x) sau ntawv yog lwm txoj hauv kev los sawv cev y-tus nqi hauv a muaj nuj nqi , y = f(x).
Ib qho piv txwv ntawm kev ua haujlwm yog dab tsi?
Piv txwv : Kev sib raug zoo x → x Nws yog a muaj nuj nqi , vim: Txhua lub ntsiab hauv X muaj feem xyuam nrog Y. Tsis muaj lub hauv paus X muaj ob lossis ntau qhov kev sib raug zoo.
Pom zoo:
Vim li cas peb thiaj li kho cov coefficients thaum ntsuas cov tshuaj sib npaug thiab tsis yog cov ntawv sau npe?
Thaum koj hloov cov coefficients, koj tsuas yog hloov tus naj npawb ntawm cov molecules ntawm cov khoom tshwj xeeb. Txawm li cas los xij, thaum koj hloov cov ntawv sau npe, koj tab tom hloov cov tshuaj nws tus kheej, uas yuav ua rau koj qhov sib npaug tshuaj tsis raug
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Koj puas siv cov lus qhia hauv kev sau ntawv sau?
Tsab ntawv no yog ntsuas koj lub peev xwm los tsim qhov kev sib cav uas siv cov peev txheej. Yog tias koj siv cov ntaub ntawv los ntawm cov peev txheej, koj yuav tsum sau nws. Yog tias koj nqa cov ntawv tawm ntawm qhov chaw, koj yuav tsum muab tso rau hauv cov lus hais. Tom qab koj hais los yog piav ib qhov chaw, hais nws raws li koj xav tau hauv ib daim ntawv: (Source F) lossis (Gilman)
Thaum twg koj yuav tsum siv cov haujlwm series koj siv nws li cas?
Nws yog siv los txiav txim siab cov khoom ntawm ib qho kev hloov pauv, uas yog hlau A yuav hloov lwm cov hlau B hauv kev daws yog tias A siab dua hauv koob. Kev ua yeeb yam ntawm qee cov hlau ntau dua, teev nyob rau hauv qhov kev txiav txim qis ntawm reactivity
Cov txheej txheem dab tsi uas tus kws tshawb fawb siv los tsim ntau cov ntawv luam ntawm DNA xav tau sau rau hauv daim ntawv dawb paug 1?
Molecular Cloning. Cloning tso cai rau tsim ntau cov ntawv luam ntawm cov noob, qhia cov noob, thiab kawm txog cov noob tshwj xeeb. Yuav kom tau txais cov DNA tawg rau hauv cov kab mob hauv cov kab mob hauv daim ntawv uas yuav tau theej lossis nthuav tawm, cov khoom tawg yog thawj zaug tso rau hauv plasmid