Ivan Shishkin, Rye (1878)

Problems/GeometryExerciseReviewed

Equation d’une ellipse ? 22

by Sequoia·
28
Difficulty scaleÉchelle de difficulté

This score reflects both the level of the required concepts and the difficulty of the solution.Ce score tient compte à la fois du niveau des notions nécessaires et de la difficulté de la résolution.

  1. 1–10First steps / middle schoolPremiers pas / collège
  2. 11–25Beginner / high schoolDébutant / lycée
  3. 26–50Intermediate / undergraduateIntermédiaire / licence
  4. 51–70Advanced / graduateAvancé / master
  5. 71–90Expert / specializedExpert / spécialisé
  6. 91–100Research levelNiveau recherche
These levels are approximate guides.Ces niveaux sont des repères approximatifs.
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Parmi les équations suivantes, lesquelles définissent une ellipse ?

  1. 5x2+2y2=05x^{2}+2y^{2}=0
  2. x2−y2=1x^{2}-y^{2}=1
  3. x2+2x+y2=1x^{2}+2x+y^{2}=1
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