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Aflati media aritmetica a numerelor X si Y daca: X=3la 17 si Y=3la 20


Răspuns :

[tex] m_a=\frac{x+y}{2}=\frac{3^{17}+3^{20}}{2}=\frac{3^{17}(1+3^3)}{2}=\frac{3^{17}*28}{2}=3^{17}*14 [/tex]
Ma=(x+y):2
x+y=3¹⁷+3²⁰=3¹⁷*(1+3³)=3¹⁷*28
Ma=3¹⁷*28:2=3¹⁷*14