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solve an equation of the form x^2=a

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Chained calculations in trigonometry

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Optimization and benefit of a craftsman

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Exercices : Lien entre fonction exponentielle et suites géométriques

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Etude .Fonction auxiliaire ,fonction principale 1

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Romanian Mathematics Olympiad

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Solve 2 to the x = 9 , what is x=? Can you solve this type of Algebra Equation?

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Exercises around remarkable identities