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En este libro se presenta un amplio conjunto de métodos de resolución y demostración de desigualdades. Aparte de los métodos más conocidos se exponen también métodos difíciles de encontrar en la bibliografía habitual por su marcado carácter no estándar; como es sabido, el estudio de estos últimos no recibe la debida atención en los cursos de matemática elemental. Es por eso que el autor se ha propuesto ilustrar la aplicación de estos métodos con ayuda de problemas en los que detalladamente se resuelven o se demuestran desigualdades de diferentes tipos, tomadas de diferentes ramas de la matemática (álgebra, trigonometría, geometría). Este libro está dirigido a los alumnos de los últimos grados de las escuelas de enseñanza media que deseen ampliar sus conocimientos en matemática. Sin duda, será de gran ayuda para una comprensión más profunda del curso escolar de matemática, así como en la preparación para concursos y olimpiadas de matemática de cualquier nivel y para los exámenes de ingreso en los centros de educación superior. El estudio de los métodos de resolución y demostración de desigualdades propuestos aquí permitirá, en primer lugar, ampliar considerablemente la cantidad de tipos de problemas que podrán ser resueltos por el lector y, en segundo lugar, desarrollar sus habilidades matemáticas en general, tanto teóricas como prácticas. El libro está dirigido a los alumnos de los últimos grados de las escuelas de enseñanza media interesados en el estudio de la matemática, así como a aquellos que aspiran a ingresar en centros de educación superior y necesitan una profunda preparación en esta asignatura. Los profesores de matemática de enseñanza media y superior también pueden hacer uso del mismo para la confección de exámenes, concursos y cualquier otro tipo de pruebas.