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Zinseszinsformel:
\( K_{n}=K_{0} \cdot\left(1+\frac{p}{100}\right)^{n} \)
\( 1400=1000 \cdot\left(1+\frac{2}{100}\right)^{n} \)
\( \left(1+\frac{2}{100}\right)^{n}=\frac{7}{5} \)
\( 1,02^{n}=\frac{7}{5} \)
\( n \cdot \ln (1,02)=\ln \left(\frac{7}{5}\right) \)
\( n=\frac{\ln \left(\frac{7}{5}\right)}{\ln (1,02)} \approx 16,99 \) Jahre
