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Cum calculez 2+2²+2³+....+2la puterea 60?


Răspuns :

[tex]2^1+2^2+2^3+...+2^n= 2^{n+1}-2 [/tex]

[tex]2+2^2+2^3+...+2^{60}= 2^{61}-2 [/tex]