2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ib lo lus, qhov gradient ∇f(a) cov ntsiab lus nyob rau hauv cov kev taw qhia ntawm qhov loj tshaj qhov nce ntawm f, uas yog, cov kev taw qhia ntawm steepest ascent. Tau kawg, qhov kev taw qhia ntawm oppo-site, −∇f(a), yog kev taw qhia ntawm qhov siab tshaj plaws. √ 16 - 4x2 - y2. Txoj kev nkhaus ntawm qhov chaw siab tshaj plaws yuav nyob rau sab nraud, −∇f.
Vim li cas gradient thiaj li nce toj siab?
Qhov no txhais tau hais tias tus nqi hloov pauv raws li qhov tsis txaus ntseeg vector v yog qhov siab tshaj plaws thaum v cov ntsiab lus nyob rau hauv tib txoj kev raws li qhov gradient. Hauv lwm lo lus, qhov gradient sib haum rau tus nqi siab tshaj plaws / qhovntsej thiaj tsis mob.
gradient feem ntau yog qhov loj tshaj plaws nyob qhov twg?
kwj dej gradients yuav siab dua nyob rau hauv a kwj dej taub hau (qhov nws pib) thiab qis dua ntawm lawv lub qhov ncauj, qhov chaw uas lawv tawm mus rau lwm lub cev dej (xws li dej hiav txwv).
nqes siab tshaj plaws txhais li cas?
(steeper comparative) (steepest superlative) 1 adj Ib tug nqes hav nce toj ntawm lub kaum ntse ntse thiab nyuaj nce mus.
Puas gradient ib txwm zoo?
Qhov gradient hloov ntawm qhov tsis zoo mus rau qhov zoo ntawm no, yog li daim duab ntawm y=g′(x) yuav dhau los ntawm qhov taw tes (−2, 0). Qhov gradient ntawm y=g′(x) ib txwm nce, thiab daim duab ntawm y=g (x) yog ib txwm khoov rau sab laug li x nce. Yog li ntawd g″(x) yeej ib txwm zoo.
Pom zoo:
Qhov khoom nyob rau pem hauv ntej ntawm lub lens diverging nyob qhov twg?
Teb: Dav hlau daim iav Dav Hlau Daim iav Rau lub teeb rays tawm lub dav hlau daim iav, lub lub kaum sab xis ntawm kev xav sib npaug ntawm lub kaum sab xis ntawm qhov xwm txheej. … Daim duab tsim los ntawm daim iav dav hlau yog ib txwm virtual (lub ntsiab lus tias lub teeb rays tsis yog los ntawm daim duab), upright, thiab ntawm tib lub duab thiab loj npaum li cov khoom nws yog reflecting.
Qhov chaw ncig tebchaws nyob hauv bhagalpur nyob qhov twg?
Bhagalpur faib lub zos yog ib pawg tswj hwm thaj chaw ntawm Bihar xeev ntawm Is Nrias teb, nrog Bhagalpur ua thawj coj hauv paus chaw haujlwm. Raws li xyoo 2005, qhov kev faib muaj xws li Bhagalpur koog tsev kawm ntawv, thiab Banka koog tsev kawm ntawv thiab nyob rau ntawm ntug dej ntawm Ganga River.
Kev tsis ncaj ncees nyob qhov twg yog qhov hem rau kev ncaj ncees nyob txhua qhov chaw?
Martin Luther King tau hais tias: “Kev tsis ncaj ncees nyob txhua qhov chaw yog kev hem thawj rau kev ncaj ncees nyob txhua qhov chaw. Peb raug ntes nyob rau hauv ib tug inescapable network ntawm kev sib nrig sib pab, khi nyob rau hauv ib lub tsoos tsho ntawm txoj hmoo.
Qhov twg yog qhov tsis txaus ntseeg nyob qhov twg?
Yuav muaj ob lub cev tsis zoo nyob rau hauv lub midbrain. Lawv yog symmetrically positioned, ib tug nyob rau ntawm ob sab ntawm lub midline ntawm lub hlwb, thiab lawv tsim ob lub pob nyob rau hauv lub posterior nto ntawm lub paj hlwb nyob rau hauv qab ntawm lub superior colliculi.
Qhov twg tag nrho cov nqi hluav taws xob nyob ntawm qhov kev siv nyiaj siab tshaj plaws yog qhov twg?
marginal utility is zero. Tag nrho cov nqi hluav taws xob yog siab tshaj thaum marginal utility yog xoom. Qhov no yog vim muaj ntau txoj cai ntawm kev txo qis marginal utility uas hais tias tus neeg siv khoom noj ntau thiab ntau qhov zoo, qhov ntxiv rau tag nrho cov nqi hluav taws xob poob.
