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Rezultatul calculului: 2^2^2005 : 2^2^2004 : 2^2^2004 =?

Răspuns :

[tex]\begin{aligned}2^{2^{2005}} : 2^{2^{2004}} : 2^{2^{2004}} &= 2^{2^{2005}-2^{2004}}:2^{2^{2004}}\\ &=2^{2^{2005}-2^{2004}-2^{2004}}\\ &= 2^{2^{2005}-2\cdot 2^{2004}}\\ &= 2^{2^{2005}-2^{2004+1}}\\ &= 2^{2^{2005}-2^{2005}}\\ &=2^{0} \\ &=\boxed{1}\end{aligned}[/tex]