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--- gabi_macsim
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(eroare: eq.0/26268)$\s_0=0$
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(eroare: eq.0/26270)$\3^i$
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(eroare: eq.0/26276)$\sum_{k=1}^n\3^k\cdot(2^n)$
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[ equation]$\displaystyle\sum_{k=1}^n 3^k$[/equation]
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