Quiz: calculating a definite integral

[Gerson W. Barbosa]

(12-31-2013 01:14 PM)Thomas Klemm Wrote:  It takes 2'27" to calculate this integral on a DM-15CC with FIX 9.
It takes 28" to do it with the RPN-15C emulator on my iPhone.
On a real HP-15C it takes probably much longer.

5 seconds on my outdated iPhone 4s with HP-15C emulator by HP:

Code:

001- f LBL A
002-   CHS
003-   y^x
004- g RTN

0 ENTER 1 f Integrate --> 1.291285997 (blinking, but that's another story)

Estimated +4 hours on a real HP-15C.

As a comparison the following return the same result (no blinking, of course!) in 13.7 and 13.4 seconds, respectively, on my 30-year old HP-15C:

Code:


001- f LBL A            001- f LBL A
002-   0                002- f MATRIX 1
003-   STO 0            003-   8
004-   9                004-   STO I
005-   STO I            005- f LBL 0
006- f LBL 0            006-   RCL 1
007-   RCL I            007-   RCL+ I
008-   ENTER            008-   ENTER
009-   CHS              009-   CHS
010-   y^x              010-   y^x
011-   STO+ 0           011-   STO+ 0
012- f DSE I            012- f DSE I
013-   GTO 0            013-   GTO 0
014-   RCL 0            014-   RCL 0
015- g RTN              015- g RTN

Cheers,

Gerson.