Kvadratické funkce Flashcards

0
Q

Definiční obor kv fce

A

R

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1
Q

Předpis kv fce

A

y = ax2 + bx + c, a,b,c, € R ^ a je různý od nuly

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2
Q

Obor hodnot kv fce

A

Pro:
a > 0 < 0 ( - nekonečno; c - b2/4a>

Závisí na konkrétní funkci, ale vždy jde do +/- nekonečna.

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3
Q

Graf kv fce

A

Parabola

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4
Q

Souřadnice vrcholu grafu kv fce

A

V = [-b/2a; c- b2/4a]

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5
Q

Omezenost kv fce

A

Pro
a > 0 omezená zdola, má minimum (ve VRCHOLU)

       a < 0     omezená shora, má maximum
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6
Q

Sudost kv fce

A

Když vrchol leží na ose y, je sudá.

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7
Q

Co musim znát k sestrojení grafu kv fce

A

Souřadnice vrcholu a průsečíky

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8
Q

Průsečík s osou y (kv fce)

A

Py = [0, c]

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9
Q

Osa paraboly

A

Přímka || s osou y a prochází vrcholem, parabola je podle nim souměrná.

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10
Q

Urči souřadnice vrcholu grafu:

y = a (x - m)2 + n

A

V = [m,n]

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