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In triunghiul ABC,fie AD inaltimea corespunzatoare lui
si
,
,
.Exprimati
functie de
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miriam
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[ equation]$\displaystyle\sum_{k=1}^n \a_k=\S_n$[/equation]
[ equation]$\displaystyle\sum_{j=1}^n \(3^j)\cdot(2^S_(n-j))=\A$[/equation]
[ equation]$\displaystyle\frac{2^S_n\cdot(2^(2\cdot(p)-1)\-A}{3^(n+1}$[/equation]
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gabi_macsim
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gabi_macsim
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(eroare: eq.1/26238)$\displaystyle\S_0=\0$
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gabi_macsim
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gabi_macsim
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gabi_macsim
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(eroare: eq.2/26241)$\displaystyle\A=\sum_{i=1}^n (3^j)\cdot (2^S_(n-j))$
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gabi_macsim
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[Citat]
(eroare: eq.2/26242)$\displaystyle\A=\sum_{i=1}^n (3^j)\cdot (2^S_n-j)$
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gabi_macsim
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(eroare: eq.2/26243)$\A=\sum_ {i=1]^n 3^i$
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gabi_macsim
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[Citat]
(eroare: eq.2/26244)$\A=\sum_ {i=1}^n 3^i$
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gabi_macsim
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