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m Bot: Migrating 1 interwiki links, now provided by Wikidata on d:q4672905 |
simple discount formula is incorrect |
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*[[simple interest]]: <math>a(t)=1+t \cdot i</math>
*[[compound interest]]: <math>a(t)=(1+i)^t</math>
*[[simple discount]]: <math>a(t) = (1-d\cdot t)^(-1)</math>
*[[compound discount]]: <math>a(t) = (1-d)^{-t}</math>
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