I became one of the 15c collecting Crowd

[Johnh]

(10-28-2023 01:54 AM)Gerson W. Barbosa Wrote:  

(10-28-2023 12:19 AM)Johnh Wrote:  I tried integrating e^(x^3) , x= 0 to 6, on the hp15C CE and Touch 15i emulator at full speed. It did indeed converge, using display SCI 6, which is an many digits as can be displayed directly. The calculator got there in 17 seconds, and the emulator in about 2 seconds. With SCI 5 it was about 7sec and 1sec respectively.

Exactly the same value was produced by the calculator and emulator. In SCI 6:

5.963 938 x 10^91

Try integrating from x = 5 to x = 6 and compare the results and times. The HP-15C app by HP gives the answers instantly (too bad the blinking display bug still persists after all those years).

With x= 5 to 6, both machines run in close to half the time as for 0 to 6. And of course, the result is the same to the 6 decimal places as used above. At x=5, the function still has almost 40 more orders of magnitude to rise before it gets to x = 6 !