Sharp EL-W506T vs. Sharp EL-W516T

[rprosperi]

(11-14-2019 06:35 PM)Pjwum Wrote:  

(11-13-2019 11:43 PM)rprosperi Wrote:  Though probably just perfect for any integral your daughter will encounter... and likely anyone else that doesn't seek pathological equations to integrate. .

I checked and yes, it is an EL-W506X and it says WriteView right over the LCD.

Let me come back to its calculus capabilities. I repeated the integral and these are the numbers:
Casio fx-991DE: 5.963938092E+91
Prime (Handheld): 5.96393809188E+91
Sharp W506X: 7.466216848E+91

Meanwhile I learned you may specify n as an option when entering the formula.

But does its auto mode of only 100 Simpson intervals really affect everyday calculations? Let us assume some average physics teacher in high school proposing this task: Calculate the energy needed to bring Tesla's starman (1000 kg) one light year away from Earth!
Instead of finding the antiderivative you try to solve the integral(rE, 1 ly, G*mE*1000kg/r^2) numerically. In auto mode without specifying n you will then find (kg*m^2/s^2):
Casio fx-991DE: 6.251161691E+13
Prime (Handheld): 6.25116169124E+13
Sharp W506X: 1.547252475E+20

Gee, that's only off by a factor of ~2.5E06; what's 1.5E20 kg*m^2/s^2 among friends?

Seriously, that is surprisingly poor, so you've made a really good point here, though I still doubt she will get an assignment like that in High School.

If you set n manually, is it retained for future integrals, or is it reset to the default for each integral/equation you try to solve?

From curiosity, do you happen to know how many intervals the fx-991DE and Prime used to achieve essentially the same result?