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(eroare: eq.0/26245)$\displaystyle\sum_{i=1}^n 3^i=\A$
--- gabi_macsim
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(eroare: eq.0/26246)$\displaystyle\sum_{i=1}^n\3^i=\A$
--- gabi_macsim
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(eroare: eq.0/26247)$\displaystyle\sum_{i=1}^n 3^i=\A$
--- gabi_macsim
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[ equation]$ 3 \cdot j $[/equation]
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--- gabi_macsim
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--- gabi_macsim
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(eroare: eq.0/26254)$\sum_{k=1}^n 3\cdot k=\b$
--- gabi_macsim
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[ equation]$\sum_{k=1}^n\3^k $[/equation]
--- gabi_macsim
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(eroare: eq.0/26256)$\sum_{k=1}^n\3^k $
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--- gabi_macsim
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