Quadratic functions tuaj yeem sawv cev los ntawm kab zauv, y(x)=ax2 + bx + c, qhov twg a, b, thiab c yog qhov tsis tu ncua, thiab a ≠ 0. Daim ntawv no raug xa mus rau daim ntawv qauv.
Qhov twg sawv cev rau cov lus nug plaub npaug?
Quadratic muaj nuj nqi: yog ib txoj haujlwm uas tuaj yeem sau rau hauv daim ntawv f(x)=ax2 + bx + c qhov twg a, b, thiab c yog tus lej tiag thiab a=0. Parabola: Daim duab ntawm kev ua haujlwm squaring hu ua parabola. Koj nyuam qhuav kawm 23 nqe lus!
Dab tsi sawv cev rau lub luag haujlwm plaub lub hlwb?
A quadratic muaj nuj nqi yog ib daim ntawv f(x)=ax2 + bx + c, qhov twg a, b, thiab c yog cov lej uas tsis sib npaug rau xoom. Daim duab ntawm ib qho kev ua quadratic yog qhov nkhaus hu ua parabola.
3 lub luag haujlwm yog dab tsi?
Ntawm no yog peb daim ntawv sib npaug plaub npaug yuav tsum tau sau rau hauv:
- 1) Cov qauv qauv: y=ax2 + bx + c qhov twg a, b, thiab c yog cov lej xwb.
- 2) Factored form: y=(ax + c)(bx + d) dua tus a, b, c, thiab d yog cov lej xwb.
- 3) Vertex form: y=a(x + b) 2 + c dua tus a, b, thiab c yog cov lej xwb.
Daim duab twg zoo tshaj plaws sawv cev rau plaub lub luag haujlwm?
Daim duab ntawm lub quadratic muaj nuj nqi yog U-shaped nkhaus hu ua parabola Ib qho tseem ceeb ntawm daim duab yog tias nws muaj qhov taw tes hnyav, hu ua vertex. Yog hais tias lub parabola qhib, lub vertex sawv cev rau qhov qis tshaj plaws ntawm daim duab, los yog qhov tsawg kawg nkaus tus nqi ntawm lub quadratic muaj nuj nqi.
