Question
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OPPGAVE 1
Funksjonen er gitt ved

a) Tegn grafen til .
b) Finn nullpunktene til .
c) Finn ekstremalpunktet til .
(d) Finn verdimengden .
Funksjonen er gitt ved

e) Los både grafisk og ved regning
likningen .

Ask by Malone Newton. in Norway
Nov 12,2024

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Answer

a) Tegn grafen til ved å bruke punktene og , aksen av symmetri , og toppen .
b) Nullpunktene til er og .
c) Ekstremalpunktet til er toppen .
d) Verdimengden til er .
e) Nullpunktene til er og . Grafisk krysser grafene ved punktene og .

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Mind Expander

To draw the graph of the function , you can start by identifying key features such as the vertex and the direction of the parabola. Since the coefficient of is positive, the graph opens upwards. You can find the vertex using the formula for the vertex , where and , leading to a vertex at .
For the null points of , you need to solve the equation . Factoring gives us , resulting in and . The extremal point or vertex form shows the minimum value of the function is at when . Thus, the range of , or , is .
Now, for , you can graphically find when these two functions intersect. Graph both functions on the same axis to see where they meet. Algebraically, you set to get . Rearranging gives you the equation . Factoring results in , yielding the solutions and . These points are where the graphs of both functions intersect!

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