Question 1

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Fie functia:

f left parenthesis x right parenthesis equals 7 space x squared plus left parenthesis 2 right parenthesis space x plus space left parenthesis negative 1 right parenthesis

Fără a rezolva ecuaţia f(x)=0 asociaţi valorile corespunzătoare expresiilor de mai jos.

x subscript 1 over x subscript 2 plus x subscript 2 over x subscript 1

1 over x subscript 1 plus 1 over x subscript 2

x subscript 1 squared plus x subscript 2 squared

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