<Tr> <Td> </Td> <Td> - 4000 </Td> </Tr> <Tr> <Td> </Td> <Td> 5000 </Td> </Tr> <Tr> <Td> </Td> <Td> 2000 </Td> </Tr> <P> then the IRR r (\ displaystyle r) is given by </P>

Internal rate of return and modified internal rate of return