Wskaż ciąg geometryczny [latex]d_{n} = frac{2}{5^{n} } [/latex]

[latex]d_n= frac{2}{5^n}\d_{n+1}= frac{2}{5^{n+1}}= frac{2}{5^n*5}\q= frac{d_{n+1}}{d_n}\q= frac{frac{2}{5^n*5}}{frac{2}{5^n}}=frac{2}{5^n*5}* frac{5^n}{2}= frac{1}{5} [/latex]