Casio fx-991EX vs Hp 50g speed difference
07-18-2018, 04:28 AM (This post was last modified: 07-18-2018 05:50 AM by brickviking.)
Post: #9
 brickviking Senior Member Posts: 330 Joined: Dec 2014
RE: Casio fx-991EX vs Hp 50g speed difference
(07-13-2018 08:50 PM)Tugdual Wrote:  Found something weird.
Was speed testing the fx991ex vs 50g on $$\int_0^{500}e^{-x} dx$$
Results:
fx-991EX: result:1 time:6.64s
50g using ->NUM : result:1 time:46.69s

Huge difference...

My upgraded 9750GII gave me 1 for that formula: $$\int$$(e^-X,0,500), almost immediately. If I add a tolerance value: $$\int$$(e^-X,0,500,0.01) I get 1.000000014 in about 0.5 seconds
for tolerance values of 0.009 to 0.1724, and 1.000050478 (for a tolerance value of >0.1724 to 0.66558). Larger tolerance values affect the result more. It'd be interesting to see whether the 991EX has this tolerance value in the formula it uses.

(07-13-2018 08:50 PM)Tugdual Wrote:  Pressing EVAL on the 50g returns instantly $$- \frac {1-e^{500}}{e^{500}}$$ which seems to indicate that CAS was used since this is the exact result.

My HP50G gave me $$\frac {e^{500}-1}{e^{500}}$$ instantly instead of $$- \frac {1-e^{500}}{e^{500}}$$ when I hit EVAL from the equation writer. I presume those two are equivalent. I also observed the Approx/Exact discrepancy.

(Post 258)

Regards, BrickViking
HP-50g |Casio fx-9750G+ |Casio fx-9750GII (SH4a)
 « Next Oldest | Next Newest »

 Messages In This Thread Casio fx-991EX vs Hp 50g speed difference - Tugdual - 07-13-2018, 08:50 PM RE: Casio fx-991EX vs Hp 50g speed difference - StephenG1CMZ - 07-13-2018, 10:36 PM RE: Casio fx-991EX vs Hp 50g speed difference - Carsen - 07-13-2018, 11:13 PM RE: Casio fx-991EX vs Hp 50g speed difference - Thomas Okken - 07-14-2018, 01:45 AM RE: Casio fx-991EX vs Hp 50g speed difference - Albert Chan - 07-14-2018, 03:17 AM RE: Casio fx-991EX vs Hp 50g speed difference - pier4r - 07-14-2018, 10:27 AM RE: Casio fx-991EX vs Hp 50g speed difference - ijabbott - 07-14-2018, 03:10 PM RE: Casio fx-991EX vs Hp 50g speed difference - Tugdual - 07-16-2018, 07:07 AM RE: Casio fx-991EX vs Hp 50g speed difference - brickviking - 07-18-2018 04:28 AM RE: Casio fx-991EX vs Hp 50g speed difference - Albert Chan - 07-25-2018, 01:50 AM RE: Casio fx-991EX vs Hp 50g speed difference - Albert Chan - 07-25-2018, 12:55 PM RE: Casio fx-991EX vs Hp 50g speed difference - Carsen - 07-25-2018, 02:44 AM RE: Casio fx-991EX vs Hp 50g speed difference - Albert Chan - 07-25-2018, 06:32 PM RE: Casio fx-991EX vs Hp 50g speed difference - Carsen - 07-25-2018, 08:07 PM RE: Casio fx-991EX vs Hp 50g speed difference - Albert Chan - 07-25-2018, 10:13 PM RE: Casio fx-991EX vs Hp 50g speed difference - Carsen - 07-26-2018, 03:01 AM RE: Casio fx-991EX vs Hp 50g speed difference - Carsen - 07-26-2018, 04:53 PM RE: Casio fx-991EX vs Hp 50g speed difference - Albert Chan - 07-26-2018, 03:28 AM RE: Casio fx-991EX vs Hp 50g speed difference - Albert Chan - 07-26-2018, 07:08 PM RE: Casio fx-991EX vs Hp 50g speed difference - gomefun2 - 09-03-2018, 07:40 PM

User(s) browsing this thread: 1 Guest(s)