Devoir Blanc 02 S01

📅 November 22, 2025   |   👁️ Views: 360   |   📝 3 exercises   |   ❓ 21 questions



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\def\professor{R. MOSAID}
\def\classname{2BAC.PC/SVT}
\def\examtitle{Devoir Maison 01S01, Par Prof AFARIAD Hamza}
\def\schoolname{\textbf{Lycée :} Taghzirt}
\def\academicyear{2025/2026}
\def\subject{Mathématiques}
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% Exercise 1
\printexo{1}{}{

\vspace*{-1cm}
\begin{enumerate}
    \item Soit ~$ f $~ la fonction numérique définie par :
    ~$
    \begin{cases}
      f(x) = \dfrac{\sqrt[3]{x^2+6x}-2\sqrt[3]{2}}{x-2} & \text{si } x \neq 2 \\
      f(2) = \dfrac{5\sqrt[3]{2}}{12}
    \end{cases}
    $~\\
    Montrer que la fonction ~$ f $~ est continue en ~$ x_0 = 2 $~.

    \item Soit ~$ f $~ la fonction numérique définie sur ~$ \mathbb{R} - \{4\} $~ par :
    ~$
    \begin{cases}
    f(x) = x - \sqrt[3]{1-x} & \text{si } x < 1 \\
    f(x) = \dfrac{1}{2-\sqrt{x}} & \text{si } x \geq 1 \text{ et } x \neq 4
    \end{cases}
    $~
    \begin{enumerate}
        \item Étudier la dérivabilité de ~$ f $~ à gauche en 1.
        \item Étudier la dérivabilité de ~$ f $~ à droite en 1.
        \item ~$ f $~ est-elle dérivable en 1? Justifier.
    \end{enumerate}

    \item Comparer les deux nombres : ~$ \sqrt[5]{91} $~ et ~$ \sqrt[3]{15} $~

    \item Résoudre dans ~$ \mathbb{R} $~ l'équation suivante :
    ~$(E) : \sqrt[3]{x^2 + 2x + 2} = 1$~
\end{enumerate}
}

% Exercise 2
\printexo{2}{}{
Soit ~$ f $~ la fonction numérique définie sur ~$ ]1; +\infty[ $~ par :
~$f(x) = \frac{1}{x-1} - \sqrt{x}$~

\begin{enumerate}
    \item Donner le tableau de variations de la fonction ~$ f $~.
    \item Montrer que l'équation ~$ f(x) = 0 $~ admet une solution unique ~$ \alpha $~ dans l'intervalle ~$ ]1; +\infty[ $~ et que ~$ \alpha \in ]1; 2[ $~.
    \item Vérifier que : ~$ \alpha = \sqrt[3]{2\alpha^2 - \alpha + 1} $~.
    \item Donner le signe de ~$ f $~ sur ~$ ]1; +\infty[ $~.
\end{enumerate}
}

% Exercise 3
\printexo{3}{}{
Soit \( f \) la fonction définie par :
~$f(x) = \frac{x}{\sqrt{x^2 - 1}}$~\\
et soit ~$(\mathcal C_f)$~ sa courbe représentative dans un repère orthonormé ~$(O; \vec i, \vec j)$~.

\begin{enumerate}
    \item Vérifier que : ~$ D_f = ]-\infty; -1[ \cup ]1; +\infty[ $~.
    \item Montrer que la fonction ~$ f $~ est impaire.
    \item Calculer ~$ \lim_{x \to 1^+} f(x) $~ et ~$ \lim_{x \to +\infty} f(x) $~.
    \item Montrer que pour tout ~$ x \in D_f : f'(x) = \dfrac{-1}{(x^2 - 1)\sqrt{x^2 - 1}} $~.
    \item Étudier le signe de ~$ f'(x) $~ puis dresser le tableau de variations de ~$ f $~.
    \item Écrire l'équation de la tangente ~$(T)$~ à la courbe ~$(\mathcal C_f)$~ au point d'abscisse 4.
    \item Soit ~$ g $~ la restriction de la fonction ~$ f $~ sur ~$ I = ]1; +\infty[ $~.
    \begin{enumerate}
        \item Montrer que ~$ g $~ admet une fonction réciproque ~$ g^{-1} $~ définie sur un intervalle ~$ J $~ à déterminer.
        \item Calculer ~$ g\left(\sqrt{2}\right) $~ puis montrer que ~$ g^{-1} $~ est dérivable en ~$ \sqrt{2} $~ et calculer ~$ (g^{-1})'\left(\sqrt{2}\right) $~.
        \item Déterminer ~$ g^{-1}(x) $~ pour tout ~$ x \in J $~.
    \end{enumerate}
\end{enumerate}
}

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Frequently Asked Questions

What chapters or courses does this exam cover?
This exam covers: اتصال دالة عددية, اشتقاق دالة عددية و دراسة الدوال. It is designed to test understanding of these topics.

How many questions are in this exam?
The exam contains approximately 21 questions.

Is this exam aligned with the official curriculum?
Yes, it follows the 2-bac-science maths guidelines.

What topics are covered in this course?
The course "Dérivation et Etude des Fonctions" covers key concepts of maths for 2-bac-science. Designed to help students master the curriculum.

Is this course suitable for beginners?
Yes, the material is structured to be accessible while providing depth for advanced learners.

Are there exercises or practice problems?
This resource includes 3 exercise(s) to reinforce learning.

Does this course include solutions?
Solutions are available separately.


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