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Crash when Solve for Integral with 15C
09-03-2017, 08:01 AM (This post was last modified: 09-03-2017 08:58 AM by brickviking.)
Post: #54
RE: Crash when Solve for Integral with 15C
For my two Casio fx-9750s, I got the following results. fx-9750g+ wouldn't integrate it, claiming a Ma Error on both the Gauss and Simpson methods. However, the fx-9750GII SH4 (with the OS upgraded to 9760GII) gave me 5.963938092 E91 using this formula (where $ means integration symbol): $(f(x), lower, upper, tolerance). It took about 3.5 seconds for $(e^x^3, 0, 6, 0.001), about 5.8 seconds for 0.00001, about 10.6 seconds for 0.00000001 and about 12.3 seconds for 0.000000001.

My HP-50G took about 1m5s $(0,6,e^x^3,x) ->NUM and coughed up 5.9639380919 E91 with Std number format and 16 seconds with FIX4. Switching it back to Std coughed up 5.96393743779E91, but I expected this. What I didn't expect was that a Casio with SH4A (and no known FPU) clocked at 29.5MHz (or thereabouts), a supposedly inferior machine, came up with a significantly faster time than a calculator clocked roughly at 75MHz.

EDIT: added data for clock speeds.

(Post 72)

Regards, BrickViking
HP-50g |Casio fx-9750G+ |Casio fx-9750GII (SH4a)
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RE: Crash when Solve for Integral with 15C - brickviking - 09-03-2017 08:01 AM



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