Cov txheej txheem:
- Puas yog lub hauv paus ntawm kev sib npaug ntawm plaub npaug?
- Puas yog cov hauv paus hniav ntawm plaub fab kev daws teeb meem?
- Puas yog cov hauv paus thiab kev daws tib yam?
- Puas yog cov tshuaj hu ua cag?
Video: Puas yog cov hauv paus ntawm kev sib npaug plaub npaug?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Roots tseem hu ua x-intercepts los yog zeros . … Yog li ntawd, kom nrhiav tau cov hauv paus hniav ntawm ib tug quadratic muaj nuj nqi, peb teem f (x)=0, thiab daws cov kab zauv, ax2 + bx + c=0.
Puas yog lub hauv paus ntawm kev sib npaug ntawm plaub npaug?
Rau qhov sib npaug ax2+bx+c=0, b2-4ac yog hu ua kev cais thiab pab txiav txim qhov xwm txheej ntawm cov hauv paus hniav ntawm ib qho kev sib npaug quadratic. Yog b2-4ac > 0, cov hauv paus hniav yog tiag tiag thiab txawv. Yog b2-4ac=0, lub hauv paus yog tiag thiab sib npaug
Puas yog cov hauv paus hniav ntawm plaub fab kev daws teeb meem?
Thaum peb daws qhov sib npaug plaub npaug peb tau txais cov kev daws hu ua cov hauv paus lossis qhov chaw qhov chaw ua haujlwm hla tus x axis.
Puas yog cov hauv paus thiab kev daws tib yam?
Txoj kev daws teeb meem ntawm kev sib npaug ntawm ntau lub npe, f(x), yog lub ntsiab lus uas nws lub hauv paus, r, yog tus nqi ntawm x thaum f(x)=0. … (-3, 0) thiab (1, 0)) yog cov kev daws teeb meem rau qhov sib npaug txij li -3 thiab 1 yog qhov tseem ceeb uas f(x)=0. Saib daim duab hauv qab no. -3 thiab 1 yog cov hauv paus.
Puas yog cov tshuaj hu ua cag?
Peb nquag siv lo lus hauv paus thaum xa mus rau cov kev daws teeb meem ntawm kev sib npaug. Piv txwv li, thaum peb muaj ib tug polynomial P(x), peb hu nws zeros lub hauv paus ntawm P(x). Rau ib co polynomials peb tuaj yeem txheeb zeros nrog lub hauv paus muaj nuj nqi ntawm qee yam, hais x2−4=0, peb tuaj yeem nqa cov hauv paus square ntawm 4 kom tau txais cov kev daws teeb meem.
Pom zoo:
Qhov twg yog qhov kev ntxub ntxaug ntawm kev sib npaug plaub npaug?
Tus neeg ntxub ntxaug yog ib feem ntawm cov qauv quadratic hauv qab lub cim square hauv paus: b²-4ac. Tus neeg ntxub ntxaug qhia peb seb puas muaj ob txoj kev daws teeb meem, ib qho kev daws teeb meem, lossis tsis muaj kev daws teeb meem . Yuav ua li cas thiaj nrhiav tau kev ntxub ntxaug ntawm kev daws teeb meem?
Dab tsi yog kev ntxub ntxaug hauv kev sib npaug plaub npaug?
Tus neeg ntxub ntxaug yog ib feem ntawm cov qauv plaub fab hauv qab lub cim square hauv paus: b²-4ac. Tus neeg ntxub ntxaug qhia peb seb puas muaj ob txoj kev daws teeb meem, ib qho kev daws teeb meem, lossis tsis muaj kev daws teeb meem . Tus nqi sib cais txhais li cas?
Puas yog txhua plaub plaub plaub plaub plaub fab?
Ib daim duab plaub yog ib qho parallelogram nrog plaub lub kaum sab xis, yog li tag nrho cov duab plaub yog kuj parallelograms thiab quadrilaterals. Ntawm qhov tod tes, tsis yog txhua qhov quadrilaterals thiab parallelograms yog cov duab plaub.
Ntawm qhov sib npaug ntawm qhov sib npaug ntawm cov reactants) thiab cov khoom) yog qhov tas li?
Nyob rau hauv ib qho tshuaj sib npaug, cov tshuaj tiv thaiv rau pem hauv ntej thiab thim rov qab Cov tshuaj tiv thaiv rov qab yog ib qho reaction uas hloov dua siab tshiab ntawm reactants rau cov khoom thiab hloov cov khoom rau reactants tshwm sim ib txhij … Hauv qhov rov qab cov tshuaj tiv thaiv, hydrogen iodide decomposes rov qab rau hauv hydrogen thiab iodine.
Nyob rau hauv ib qho kev tsis sib haum xeeb pn kev sib tshuam cov kev sib tshuam tam sim no ntawm qhov sib npaug yog?
Nyob rau hauv qhov tsis ncaj ncees PN-kho qhov kev sib tshuam tam sim no ntawm qhov sib npaug yog zero, vim tias sib npaug tab sis cov neeg nqa khoom hla hla kev sib tshuam . Thaum pn kev sib tshuam tsis ncaj ncees qhov kev sib tshuam tam sim no ntawm qhov sib npaug yog?