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ZombieJaune6213

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Ce contenu est protégé par le droit d'auteur. Toute reproduction à l'extérieur des forums Alloprof est interdite et pourra être considérée comme une violation du droit d'auteur.

I doubt understand the Varition and signes but I try

Andréa C

Hello, ZombieJaune6213!

You are right that the variation over the interval [0, 2] is different from the one in [2, 24].

The variation of a function is expressed in terms of increase, decrease, and constancy.

So, you need to add these key terms when you name each interval.

For the signs, you noticed that something is different for [0, 3] compared to the rest of the graph. You have the instinct that it has something to do with f(x) and 0.

Well, f(x) ≤ 0 over [0, 3].

Now, f(x) ? 0 over the rest.

https://www.alloprof.qc.ca/en/students/vl/mathematics/the-properties-of-functions-m1107

Do not hesitate to ask more questions!

LucioleLucide6774

Hello ZombieJaune6213,

Thank you for asking your questions here at the Help Zone.

I invite you to read this Alloprof concept sheet, which explains the properties of variation and the sign of a function in general :

https://www.alloprof.qc.ca/en/students/vl/mathematics/the-properties-of-functions-m1107

If you have any other questions, do not hesitate to reach out.

LucioleLucide6774