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HP 15C and INT(1/√(1-x),0,1)
01-08-2018, 04:07 PM (This post was last modified: 01-09-2018 02:35 PM by salvomic.)
Post: #7
RE: HP 15C and INT(1/√(1-x),0,1)
I could try a confrontation between a classic and a Limited edition HP15.
They started in the same instant, running to calculate the “not trivial” integral: ∫(1/(√(1-x)),0,1) that’s close 2.
Both started with four digit precision (FIX 4).
LE returned the results (1.9999) after about 3 mins, then it started again with 6 digit precision (FIX 6).
After 50 mins the classic 15C (FIX 4) was still running, instead the LE (FIX 6) gave up with “Error 0” message ("Improper mathematics operation": why?)
The code is:
Code:

LBL 0
CHS
1
+
SQRT
INV
RTN
They run with: 0 ENTER 1, f-∫ 0 (integral of label 0)...

After 75 mins the old HP15C is still running...
At this time (after a pause) I start again LE with FIX5.
After 25 mins LE returns 1.99999 and old HP15 still running (just now since 100 mins)...
At the end I stopped HP15C (old) after about 2h without the result (with FIX4)...

Besides the different speed, I wonder if the error in LE with FIX6 was only random or a limit for it (but I don't think)...

Salvo

∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C - DM42, DM41X - WP34s Prime Soft. Lib
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Messages In This Thread
HP 15C and INT(1/√(1-x),0,1) - salvomic - 11-26-2017, 07:51 PM
RE: HP 15C and INT(1/√(1-x),0,1) - JimP - 01-12-2018, 04:18 AM
RE: HP 15C and INT(1/√(1-x),0,1) - salvomic - 01-08-2018 04:07 PM
RE: HP 15C and INT(1/√(1-x),0,1) - tgray - 01-09-2018, 03:42 PM



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