Lub axis ntawm symmetry yog txoj kab ntsug uas mus los ntawm vertex ntawm parabolayog li sab laug thiab sab xis ntawm parabola yog sib luag. Kom ua kom yooj yim, kab no faib cov duab ntawm ib qho kev sib npaug rau hauv ob daim iav.
Koj pom qhov axis ntawm symmetry li cas?
X -coordinate ntawm lub vertex yog qhov sib npaug ntawm axis ntawm symmetry ntawm parabola. Rau ib tug quadratic muaj nuj nqi nyob rau hauv tus qauv daim ntawv, y=ax2 + bx + c, axis ntawm symmetry yog ib tug ntsug kab x=−b2a.
Koj pom qhov vertex ntawm axis ntawm symmetry li cas?
Daim ntawv Vertex ntawm ib qho kev ua haujlwm plaub yog muab los ntawm: f(x)=a(x−h)2+k, qhov twg (h, k) yog Vertex ntawm parabola. x=h yog axis ntawm symmetry. Siv ua kom tiav txoj kev square los hloov f(x) rau hauv Vertex Form.
Dab tsi yog qhov axis ntawm symmetry piv txwv?
Ob sab ntawm daim duab ntawm ob sab ntawm lub axis ntawm symmetry zoo li daim iav duab ntawm ib leeg. Piv txwv li: Qhov no yog daim duab ntawm parabola y=x2 – 4x + 2 ua ke nrog nws cov axis ntawm symmetry x=2. Lub axis ntawm symmetry yog kab liab ntsug.
Dab tsi taw tes nyob ntawm qhov axis ntawm symmetry?
Tus vertex yog qhov taw tes siab tshaj yog tias tus parabola qhib downward thiab qhov qis tshaj yog tus parabola qhib upward. Lub axis ntawm symmetry yog txoj kab uas txiav cov parabola rau hauv 2 qhov sib txuam halves thiab lub vertex nyob ntawm axis ntawm symmetry.
