(Free42,DM42) NPV and IRR

[Pekis]

(06-12-2020 04:04 PM)Werner Wrote:  Regarding the solver: many times it just works correctly, but with the above example, if you specify 2 guesses (1 and 2) for IRR%, it still returns the correct answer, but mentions 'Extremum'? How can the same result, with he same input, be regarded as a root or an extremum, depending on the guesses?
Werner

Hello Werner,

With guesses 0.01 and 0.02, my program returns 0.020416943595, and if I press "IR" one more time, I get "Sign reversal", so I don't know what's goin' on in your program ... An extremum is impossible, I think, if first cash flow negative and the others positive ...