Correction - Exercice 09 page 181 - Activités algébriques
Calculons :
\(C_1=\sqrt{(\pi + 1)(\pi – 1)+1}\).
\(C_1=\sqrt{(\pi+1)(\pi–1)+1}\) \(\Rightarrow\)
\(C_1=\sqrt{(\pi^2–1^2)+1}\) \(\Rightarrow\)
\(C_1=\sqrt{\pi^2–1+1}\) \(\Rightarrow\)
\(C_1=\sqrt{\pi^2}\) \(\Rightarrow\)
\(C_1=\pi\)
\(C_2=94\times94–2\times94\times7+7\times7\).
\(C_2 = 94\times 94–2\times 94\times 7 + 7\times 7\) \(\Rightarrow\)
\(C_2 = (94–7)^2\) \(\Rightarrow\)
\(C_2 = (87)^2\) \(\Rightarrow\)
\(C_2 = 7569\)
\(C_3=1003\times997+51\times49\).
\(C_3=1003\times997+51\times49\) \(\Rightarrow\)
\(C_3=1000+3\times1000-3+5+1\times50-1\) \(\Rightarrow\)
\(C_3=1000^2-3^2+50^2-1^2\) \(\Rightarrow\)
\(C_3=1000000-9+2500-1\) \(\Rightarrow\)
\(C_3=1000000-10+2500\) \(\Rightarrow\)
\(C_3=1002490\)
\(C_4=(125)^2–(124)^2\).
\(C_4=(125)^2–(124)^2\) \(\Rightarrow\)
\(C_4=(125–124)(125+124)\) \(\Rightarrow\)
\(C_4=1\times249\) \(\Rightarrow\)
\(C_4=249\)
\(C_5=(326)^2–(325)^2\).
\(C_5=(326)^2–(325)^2\) \(\Rightarrow\)
\(C_5=(326–325)(326+325)\) \(\Rightarrow\)
\(C_5=1\times651\) \(\Rightarrow\)
\(C_5=651\)
\(C_1=\sqrt{(\pi + 1)(\pi – 1)+1}\).
\(C_1=\sqrt{(\pi+1)(\pi–1)+1}\) \(\Rightarrow\)
\(C_1=\sqrt{(\pi^2–1^2)+1}\) \(\Rightarrow\)
\(C_1=\sqrt{\pi^2–1+1}\) \(\Rightarrow\)
\(C_1=\sqrt{\pi^2}\) \(\Rightarrow\)
\(C_1=\pi\)
\(C_2=94\times94–2\times94\times7+7\times7\).
\(C_2 = 94\times 94–2\times 94\times 7 + 7\times 7\) \(\Rightarrow\)
\(C_2 = (94–7)^2\) \(\Rightarrow\)
\(C_2 = (87)^2\) \(\Rightarrow\)
\(C_2 = 7569\)
\(C_3=1003\times997+51\times49\).
\(C_3=1003\times997+51\times49\) \(\Rightarrow\)
\(C_3=1000+3\times1000-3+5+1\times50-1\) \(\Rightarrow\)
\(C_3=1000^2-3^2+50^2-1^2\) \(\Rightarrow\)
\(C_3=1000000-9+2500-1\) \(\Rightarrow\)
\(C_3=1000000-10+2500\) \(\Rightarrow\)
\(C_3=1002490\)
\(C_4=(125)^2–(124)^2\).
\(C_4=(125)^2–(124)^2\) \(\Rightarrow\)
\(C_4=(125–124)(125+124)\) \(\Rightarrow\)
\(C_4=1\times249\) \(\Rightarrow\)
\(C_4=249\)
\(C_5=(326)^2–(325)^2\).
\(C_5=(326)^2–(325)^2\) \(\Rightarrow\)
\(C_5=(326–325)(326+325)\) \(\Rightarrow\)
\(C_5=1\times651\) \(\Rightarrow\)
\(C_5=651\)
Libellés:
1ère année secondaire
Activités algébriques
Correction
Corrigées
exercice
Le Mathématicien
manuel scolaire
Math
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