Control 02 S01, Ordre dans IR et Calcul vectoriel

📅 November 24, 2025   |   👁️ Views: 449   |   📝 3 exercises   |   ❓ 19 questions



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This PDF covers maths exam for tronc-commun-sciences students. It includes 3 exercises and 19 questions. Designed to help you master the topic efficiently.

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% --- Basic Settings ---
\def\professor{R. MOSAID}
\def\classname{TCSF}
\def\examtitle{Devoir 02 - S01}
\def\schoolname{\textbf{Lycée :} Taghzirt}
\def\academicyear{2025/2026}
\def\subject{Mathématiques}
\def\duration{2h}
\def\secondtitle{\small(Calcul vectoriel \& Ordre dans IR)}
\def\province{Direction provinciale de\\ Beni Mellal}
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\setstretch{1.3}
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% Exercise 1
\printexo{1}{}{
Les quatre questions suivantes sont indépendantes.

\begin{enumerate}
    \item Soient ~$ a $~ et ~$ b $~ deux nombres réels tels que :
    ~$ a \in [-2; 5] $~ et ~$-3 \leq b \leq -1$~
    \begin{enumerate}
        \item Donner un encadrement de chacun des nombres suivants :
        ~$
        2a + 7 ; \quad 3b - 14 ; \quad 3b - a
        $~
        \item En déduire une simplification du nombre :
        ~$
        X = 2|2a + 7| - |3b - 14| + |3b - a|
        $~
    \end{enumerate}

    \item Soient ~$ x $~ et ~$ y $~ deux réels tels que : \\
      1 est une valeur approchée de ~$(2x + 5)$~ à 2 près par défaut \\
      et ~$\frac{5}{2}$~ est une valeur approchée de ~$y$~ à 0.5 près par excès
    \begin{enumerate}
        \item Montrer que :
        ~$
        -2 \leq x \leq -1 \quad \text{et} \quad 2 \leq y \leq \frac{5}{2}
        $~
        \item Donner un encadrement de :
        ~$
        x \times y \quad \text{et} \quad \frac{x^2}{y}
        $~
    \end{enumerate}

    \item Résoudre dans l'ensemble ~$ \mathbb{R} $~ :\\
        \hspace*{0.5cm}a.~ ~$ |5 - 3x| = |x + 1| $~
        \hspace*{0.5cm}b.~ ~$ |x^2 - 4| + 3 = 0 $~
        \hspace*{0.5cm}c.~ ~$ |4x - 7| \leq \frac{1}{2} $~
        \hspace*{0.5cm}d.~ ~$ |1 - 2x| > 5 $~

    \item Soient ~$ x $~ et ~$ y $~ deux réels strictement positifs tels que ~$ x < y $~.~~
      Montrer que ~$\frac{x+1}{y+1}< \frac{x}{y}$~
\end{enumerate}
}

% Exercise 2
\printexo{2}{}{
Soit ~$ x $~ un réel tel que
~$
-\frac{1}{3} \leq x \leq \frac{1}{3}
$~
On pose
~$
A = \frac{1 + x}{1 + 2x}
$~

\begin{enumerate}
    \item Montrer que :
    ~$
    A - (1 - x) = \frac{2x^2}{1 + 2x}
    $~

    \item Montrer que :
    ~$
    \frac{2}{1 + 2x} \leq 6
    $~
    puis en déduire que :
    ~$
    |A - (1 - x)| \leq 6x^2
    $~

    \item En déduire que ~$\frac{4}{5}$~ est une valeur approchée du nombre ~$\frac{1,2}{1,4}$~ à ~$2,4 \times 10^{-1}$~ près.
\end{enumerate}
}

% Exercise 3
\printexo{3}{}{
Soient ABCD un parallélogramme de centre ~$ O $~ et ~$ I, J $~ deux points tels que :
~$
\overrightarrow{AJ} = \frac{3}{2} \overrightarrow{AD} \quad \text{et} \quad \overrightarrow{BI} = \frac{1}{4} \overrightarrow{BA}
$~

\begin{enumerate}
    \item
    \begin{enumerate}
        \item Construire une figure
        \item Montrer que :
        ~$
        \overrightarrow{OI} = -\frac{1}{4} \overrightarrow{BA} - \frac{1}{2} \overrightarrow{BC} \quad \text{et} \quad \overrightarrow{OJ} = \frac{1}{2} \overrightarrow{BA} + \overrightarrow{BC}
        $~
        \item En déduire que les points ~$ O, I $~ et ~$ J $~ sont alignés.
    \end{enumerate}

    \item Soit ~$ E $~ un point tel que :
    ~$
    \overrightarrow{BE} = \frac{1}{2} \overrightarrow{AB}
    $~
    \begin{enumerate}
        \item Montrer que le point ~$ I $~ est le milieu du segment ~$ [AE] $~
        \item Montrer que les droites ~$ (IJ) $~ et ~$ (CE) $~ sont parallèles.
    \end{enumerate}
\end{enumerate}

\section*{Bonus}
Soient ~$ x, y \in \mathbb{R}^+ $~. Montrer que :
~$
\sqrt{2x + 1} + \sqrt{2y + 1} \leq x + y + 2
$~
}

\end{document}



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Frequently Asked Questions

What chapters or courses does this exam cover?
This exam covers: الحساب المتجهي, Calcul vectoriel dans le plan, L'ordre dans IR - partie 2, L'ordre dans IR - partie 1, الترتيب في IR, الترتيب في IR نسخة 2. It is designed to test understanding of these topics.

How many questions are in this exam?
The exam contains approximately 19 questions.

Is this exam aligned with the official curriculum?
Yes, it follows the tronc-commun-sciences maths guidelines.

What topics are covered in this course?
The course "L'ordre dans IR" covers key concepts of maths for tronc-commun-sciences. 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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