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RAPOARTE DE NUMERE REALE REPREZENTATE PRIN LITERE

RAPOARTE DE NUMERE REALE REPREZENTATE PRIN LITERE. DEFINITIE. Fie a,b numere reale nenule.Numarul a/b se numeste raportul numerelor a si b. a ,b se numesc termenii raportului a- numaratorul b- numitorul

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RAPOARTE DE NUMERE REALE REPREZENTATE PRIN LITERE

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  1. RAPOARTE DE NUMERE REALE REPREZENTATE PRIN LITERE

  2. DEFINITIE • Fie a,bnumererealenenule.Numarul a/b se numesteraportulnumerelor a si b. • a,b se numesctermeniiraportului • a- numaratorul • b-numitorul • Un raport de numererealereprezentateprinlitere, adica de expresiialgebrice, se numesteraportalgebric.

  3. Exemple • 3x/4y; • 5/7x; • 8x2y3/3x4y5; • (5x-2y)/2xy • (x2-y2)/(x-y)

  4. Conditia de existenta a unuiraport: Un raportestedefinitnumaipentruvalorileliterelorce nu anuleazanumitorul Exemple : • 3x/4yy≠0 • 5/7xx≠0 c) 8x2y3/3x4y5x≠0;y≠0 d) (5x-2y)/2xyx≠0;y≠o e) (x2-y2)/(x-y)x≠y

  5. Amplificareasisimplificarea • A amplifica un raportinseamna a inmulltiambiitermeniaiacestuia cu aceeasiexpresie. • A simplifica un raportinseamna a impartiambiitermeniaiacestuia cu aceeasiexpresie.

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