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→Description
Equation:
Equation:
<math>\sum_{i=1}^N\dfrac{P_i}{(1+rate)^\tfrac{date_i-date_0}{365}}=0</math>
<math>\sum_{i=1}^N\dfrac{P_i}{(1+rate)^\tfrac{(date_i-date_0)}{365}}=0</math>
==Example==
==Example==