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Soit a=2+3i. Déterminer les nombres complexes b, c et d tels que b = (1/3)(conj(a-2)), c = a−2i, et d = 2*b + c. Placer ensuite les points A, B, C et D dans le plan complexe.

Mathematics

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Voici la solution de l'exercice 1.

Exercice 1

  1. a) Déterminer les nombres complexes b,cb, c et dd puis placer les points A,B,CA, B, C et DD dans le plan complexe.

Nous avons a=2+3ia=2+3i.
Calculons bb:

b=13(a−2‾)=13(2+3i−2‾)=13(3i‾)=13(−3i)=−ib = \frac{1}{3}(\overline{a-2}) = \frac{1}{3}(\overline{2+3i-2}) = \frac{1}{3}(\overline{3i}) = \frac{1}{3}(-3i) = -i

Calculons cc:

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