(17B/19B) GPM: initial payment

[Werner]

(06-01-2024 10:43 AM)Gil Wrote:  The "trouble" is that I don't think that I have some of the mentioned functions as USPV in my HP50G calculator.

'SPFV(I%,N)=EXP(LNP1(I%/100.)*N)' DEFINE

'SPPV(I%,N)=EXP(-LNP1(I%/100.)*N)' DEFINE

'USFV(I%,N)=IFTE(I%,EXPM(LNP1(I%/100.)*N)/I%*100.,N)' DEFINE

'USPV(I%,N)=IFTE(I%,-EXPM(-LNP1(I%/100.)*N)/I%*100.,N)' DEFINE

Cheers, Werner