Qhov siab tshaj plaws thiab qhov tsawg kawg nkaus hauv lej yog dab tsi?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Hauv lej , cov siab kawg thiab yam tsawg kawg nkaus ntawm ib qho kev ua haujlwm yog qhov loj tshaj plaws thiab qhov tsawg tshaj plaws uas qhov kev ua haujlwm yuav siv ntawm ib qho chaw. Yam tsawg kawg nkaus txhais tau tias tsawg kawg koj tuaj yeem ua tau ib yam dab tsi.

Cov lus nug tseem yog, qhov siab tshaj plaws hauv lej yog dab tsi?

Qhov siab tshaj plaws, Hauv lej , ib qho taw tes uas muaj nuj nqis ntau tshaj plaws. Yog tias tus nqi ntau dua lossis sib npaug rau tag nrho lwm cov txiaj ntsig muaj nuj nqi, nws yog qhov tseeb siab kawg . Hauv calculus, tus derivative sib npaug zero lossis tsis muaj nyob ntawm qhov ua haujlwm siab kawg taw tes.

Ib tug kuj yuav nug, koj yuav ua li cas nrhiav tau tus nqi siab tshaj plaws ntawm kev ua haujlwm? Ntxiv dua thiab, siv cov duab no, koj tuaj yeem pom tias qhov siab kawg taw tes ntawm daim duab yog ntawm y = 5. Qhov thib ob txoj kev los txiav txim qhov tus nqi siab tshaj yog siv lub kev sib npaug y = ax2 + bx + c. Yog koj kev sib npaug yog nyob rau hauv daim ntawv ax2 + bx + c, koj tuaj yeem pom cov siab kawg los ntawm kev siv lub kev sib npaug : max = c - (b2/4a).

Ua kom pom qhov no, qhov tsawg kawg nkaus hauv lej yog dab tsi?

Yam tsawg kawg nkaus . lej . Yam tsawg kawg nkaus, hauv lej , taw tes rau qhov uas tus nqi ntawm ib qho kev ua haujlwm tsawg dua lossis sib npaug rau tus nqi ntawm ib qho chaw ze (hauv zos yam tsawg kawg nkaus ) los yog nyob rau hauv ib qho chaw (tsis muaj tseeb yam tsawg kawg nkaus ); saib extremum.

Range txhais li cas hauv lej?

Cov Ntau yam (Statistics) Cov Range yog qhov qhov sib txawv ntawm qhov qis tshaj thiab qhov siab tshaj plaws. Piv txwv li: Hauv {4, 6, 9, 3, 7} tus nqi qis tshaj yog 3, thiab qhov siab tshaj plaws yog 9. ntau 9-3 = 6.