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Ordonati crescator numerele :

a ) a = 5 ³³ ; b = 2 ⁷⁷
b ) a = 2 ²⁰⁰ ; b = 3 ¹²⁰ si c = 5 ⁸⁰


Răspuns :

aducem la aceeasi putere
a) [tex] 5^{33}= (5^{3})^{11}=125^{11}[/tex]
[tex] 2^{77} =(2^{7})^{11}=128^{11}[/tex]
[tex]5^{33}<2^{77}[/tex]

b) [tex]2^{200}=(2^5)^{40}=32^{40}[/tex]
[tex]3^{120}=(3^3)^{40}=27^{40}[/tex]
[tex]5^{80}=(5^2)^{40}=25^{40}[/tex]
[tex]5^{80}<3^{120}<2^{200}[/tex]