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Media aritmetica a numerelor a=3supra2+1supra5 si b=5supra2-1supra5 este..

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Atlarsergiu18791ask

[tex] \frac{a + b}{2} = \frac{ \frac{3}{2} + \frac{1}{5} + \frac{5}{2} - \frac{1}{5} }{2} = \frac{ \frac{15}{10} + \frac{2}{10} + \frac{25}{10} - \frac{2}{10} }{2} = \frac{ \frac{39}{10} }{2} = \frac{39}{10} \times \frac{1}{2} = \frac{39}{20} [/tex]

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