A thiab B sawv cev li cas hauv daim qauv?
A thiab B sawv cev li cas hauv daim qauv?

Video: A thiab B sawv cev li cas hauv daim qauv?

Video: A thiab B sawv cev li cas hauv daim qauv?
Video: Tshuaj theem vim li cas thiaj tau nqi ?/ Siv kho mob dab tsi?/paris polyphylla use for? 2024, Kaum ib hlis
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Lus txhais: Standard Form : cov txheem daim ntawv ntawm ib kab yog nyob rau hauv daim ntawv Ax + By = C qhov twg A yog tus lej zoo, thiab B , thiab C yog cov lej. Cov txheem daim ntawv ntawm ib kab yog lwm txoj hauv kev sau qhov sib npaug ntawm kab.

Tib neeg kuj nug, A thiab B sawv cev rau dab tsi hauv daim qauv?

Standard Form [edit] Txheem daim ntawv yog lwm txoj hauv kev los sau nqes hav-intercept daim ntawv (as opposed to y=mx+ b ). A, B C yog integers (tus lej zoo lossis tsis zoo tag nrho) Tsis muaj feem lossis cov lej hauv txheem daim ntawv . Lub sij hawm "Ax" yog qhov zoo.

Tsis tas li ntawd, dab tsi yog tus qauv hauv daim ntawv parabola? f (x) = a(x - h)2 + k, qhov twg (h, k) yog lub vertex ntawm tus parabola . FYI: Cov phau ntawv sib txawv muaj kev txhais lus sib txawv ntawm kev siv " txheem daim ntawv Ib txhia hais tias f (x) = ax2 + bx + c yog " txheem daim ntawv ", thaum lwm tus hais tias f (x) = a(x - h)2 +k yog " txheem daim ntawv ".

Ib yam li ntawd, tus A sawv cev li cas hauv daim qauv?

Txhua tsab ntawv nyob rau hauv txheem daim ntawv kab zauv qhia peb ib daim ntawm cov ntaub ntawv hais txog lub parabola, ib yam li cov ntawv ntawm lub vertex daim ntawv equation muaj. Hauv txheem daim ntawv tus nqi "a". sawv cev tib yam li nws ua hauv vertex daim ntawv . Ib yam li hais ua ntej, nws dictates cov kev taw qhia ntawm parabola qhib.

Ib qho piv txwv ntawm cov qauv qauv yog dab tsi?

Txheem daim ntawv yog ib txoj hauv kev sau cov lej loj lossis tsawg heev yooj yim. 103 Luas = 1000, 4 × 103 = 4000. Yog li 4000 tuaj yeem sau ua 4 × 10³. Cov lej me tuaj yeem sau rau hauv txheem daim ntawv.

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