Video: Yuav ua li cas koj hloov tus qauv vertex mus rau factored daim ntawv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hloov pauv Ntawm qhov sib txawv Cov ntawv ntawm Quadratic - Expii. Txheem daim ntawv ax^2 + bx + c. Vertex daim ntawv yog a(x-h)^2 + k, uas qhia cov vertex thiab axis ntawm symmetry. Factored daim ntawv yog a(x-r)(x-s), uas nthuav tawm cov hauv paus hniav.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog A nyob rau hauv daim ntawv vertex?
y = a(x – h)2 + k, qhov twg (h, k) yog qhov vertex . Qhov "a" hauv qhov vertex daim ntawv yog tib "a" as. hauv y = ax2 + bx + c (uas yog, ob qho tib si a's muaj qhov zoo ib yam). Daim paib ntawm "a" qhia koj seb lub quadratic qhib lossis qhib.
Qhov thib ob, qhov vertex ntawm parabola yog dab tsi? Cov Vertex ntawm Parabola . Cov vertex ntawm parabola yog qhov point qhov twg parabola hla nws axis ntawm symmetry. Yog hais tias tus coefficient ntawm x2 lub sij hawm yog qhov zoo, lub vertex yuav yog qhov qis tshaj plaws ntawm daim duab, qhov taw tes hauv qab ntawm "U"-zoo li.
Ib yam li ntawd, nws raug nug, dab tsi yog daim foos factored?
A factored daim ntawv yog ib tug parenthesized algebraic qhia. Hauv cov nyhuv a factored daim ntawv yog ib yam khoom ntawm sums ntawm cov khoom … los yog ib tug sum ntawm cov khoom ntawm cov sums … Tej logic muaj nuj nqi yuav sawv cev los ntawm ib tug factored daim ntawv , thiab ib qho factored daim ntawv yog ib tug sawv cev ntawm ib co logic muaj nuj nqi.
Dab tsi yog qhov axis ntawm symmetry?
Daim duab ntawm ib qho kev ua quadratic yog parabola. Cov axis ntawm symmetry ntawm ib tug parabola yog ib txoj kab ntsug uas faib cov parabola rau hauv ob qhov sib xyaw ua ke. Cov axis ntawm symmetry ib txwm dhau los ntawm vertex ntawm parabola. Lub x-coordinate ntawm lub vertex yog qhov sib npaug ntawm qhov axis ntawm symmetry ntawm parabola.
Pom zoo:
Yuav ua li cas koj hloov daim ntawv dav dav mus rau cov qauv ntawm hyperbola?
Tus qauv qauv ntawm ib tug hyperbola uas openssideways yog (x - h)^2 / a^2 - (y - k)^2 / b^2 = 1. Rau lub hyperbola uas qhib thiab nqis, nws yog (y - k) ^2 / a^2 - (x- h)^2 / b^2 = 1. Nyob rau hauv ob qho tib si, qhov chaw ntawm lub hyperbolais muab los ntawm (h, k)
Yuav ua li cas koj hloov ib tug muaj nuj nqi rau hauv vertex daim ntawv?
Txhawm rau hloov lub quadratic los ntawm y = ax2 + bx + c daim ntawv rau vertex daim ntawv, y = a(x - h) 2 + k, koj siv cov txheej txheem ua kom tiav cov square. Cia peb saib ib qho piv txwv. Hloov y = 2x2 - 4x + 5 rau hauv daim ntawv vertex, thiab hais lub vertex. y = ax2 + bx + c form
Yuav ua li cas rau lub zog thaum nws hloov ntawm ib daim ntawv mus rau lwm qhov?
Kev hloov pauv hluav taws xob yog thaum lub zog hloov ntawm ib daim ntawv mus rau lwm qhov - zoo li hauv lub tshuab hluav taws xob uas hloov lub zog kinetic ntawm dej rau hauv hluav taws xob. Thaum lub zog tuaj yeem hloov pauv lossis hloov pauv, tag nrho lub zog tsis hloov pauv - qhov no yog hu ua kev txuag hluav taws xob
Yuav ua li cas koj sau txoj kab nqes nqes intercept daim ntawv nyob rau hauv tus qauv daim ntawv?
Standard form yog lwm txoj hauv kev los sau daim ntawv nqes hav-intercept (as opposed to y=mx+b). Nws sau li Ax+By=C. Koj tuaj yeem hloov daim ntawv nqes hav-intercept rau cov qauv zoo li no: Y=-3/2x + 3. Tom ntej no, koj cais qhov y-intercept (qhov no nws yog 2) zoo li no: Ntxiv 3/2x rau txhua sab ntawm kab zauv kom tau qhov no: 3/2x + y = 3
Tus qauv qauv yog dab tsi Qhov txawv ntawm tus qauv qauv thiab tus qauv molecular yog dab tsi?
Cov mis mos molecular siv cov cim tshuaj thiab cov ntawv sau npe los qhia cov naj npawb ntawm cov atoms sib txawv hauv cov molecule lossis compound. Ib qho empirical formula muab qhov yooj yim tshaj plaws, tag nrho tus lej piv ntawm atoms hauv ib qho chaw. Cov qauv qauv qhia txog kev sib koom ua ke ntawm cov atoms hauv cov molecule