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. Yog tias parabola qhib, lub vertex sawv cev rau qhov siab tshaj plaws ntawm daim duab, lossis tus nqi siab tshaj plaws.
Vim li cas lub vertex yog qhov siab tshaj plaws?
Lub vertex ntawm parabola yog qhov chaw uas parabola hla nws axis ntawm symmetry. Yog tus coefficient ntawm x2 lub sij hawm tsis zoo, lub vertex yuav yog qhov siab tshaj plaws ntawm daim duab, taw tes rau saum "U"-zoo li. …
Dab tsi yog qhov vertex ntawm sab saum toj?
In a pyramid or cone, the apex is the vertex at the "top" (opposite the base).
Dab tsi yog qhov vertex ntawm daim duab?
Lub vertex ntawm lub parabola yog qhov siab tshaj plaws lossis qhov tsawg kawg nkaus ntawm cov duab ntawm lub quadratic muaj nuj nqi.
Koj pom daim ntawv vertex ntawm daim duab li cas?
- kom pom qhov vertex: siv mis x=-b/2a.
- plug x rau hauv kab zauv muab los nrhiav y tus nqi.
- nub koj muaj (h,k)
- nrhiav ib qho taw tes ntawm daim duab thiab ntsaws rau hauv daim ntawv vertex kab zauv kom pom "a"
