Video: Y ax2 bx c li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub quadratic muaj nuj nqi yog ib txoj haujlwm ntawm lub foos y = ax2 + ua bx + c , qhov twg a≠ 0, anda, b, thiab c yog cov lej tiag.
Hais txog qhov no, ax2 BX C sawv rau dab tsi?
y = ua ax2 + ua bx + c ? Peb daim duab yog ib tug parabolaso nws yuav zoo li los yog? Hauv peb cov qauv y = ua ax2 + ua bx + c , yog a sawv rau tus lej tshaj 0 (tus lej zoo) ces tus parabola qhib upward, yog tias nws sawv rau tus lej hauv qab 0 (tus naj npawb tsis zoo) ces nws qhib downward.
Qhov thib ob, C yog dab tsi hauv qhov sib npaug ntawm parabola? Cov duab ntawm Parabolas Cov c -value yog qhov twg cov duab sib tshuam lawv-axis. Hauv daim duab no, lub c -value yog -1 thiab nws vertex yog qhov siab tshaj plaws ntawm cov duab hu ua qhov siab tshaj plaws. Graph ntawm a parabola uas opens zoo li no. Cov c -valueis qhov twg daim duab cuam tshuam y-axis.
Ib yam li ntawd, nws yog nug, dab tsi yog ib qho hauv y ax 2 bx c?
Daim duab ntawm ib qho quadratic equation hauv ob qhov sib txawv ( y = ax2 + ua bx + c ) hu ua parabola. Peb hais tias thawj parabola qhib upwards (isa U zoo) thiab lub thib ob parabola qhib downwards (yog ib tug upsidedown U duab). Txhawm rau kos duab parabola peb yuav tsum nrhiav nws qhov cuam tshuam, vertex, thiab txoj kev twg nws qhib.
Koj ua li cas Y MX C?
Kev sib npaug ntawm cov kab ncaj yog nyob rau hauv daim ntawv y = mx ua + c (m thiab c yog lej). m yog qhov gradient ntawm kab thiab c yog cov y -intercept (qhov twg daim duab hla lub y -axis).
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