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geometria analitica de lehmann - MATEMATICAS EJERCICIOS ...

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176 GEOMETRIA ANALITICA PLANA<br />

Si <strong>de</strong> la ecuación (5 ) <strong>de</strong>spejam os y , obtenem os<br />

y — ± —■ V a 2 — x l . (7 )<br />

Luego , se obtienen valores reales <strong>de</strong> y solam ente para valores <strong>de</strong> x <strong>de</strong>l<br />

intervalo<br />

— a

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