Sharp EL-W506T vs. Sharp EL-W516T

[ijabbott]

(11-16-2019 11:27 AM)Mjim Wrote:  TI-30X Pro MathPrint emulator impressions:
[...]
Differentiation seems slightly better than the Sharp EL-W516X; but isn't as good as the Casio fx-991ex and suffers by losing digits (like the Sharp) when you specify smaller epsilons:

d/dx(e^(x^3),x,x=6):

Casio fx-991EX:
6.934766564*10^95 (default epsilon, but accurate for all displayed digits)

Sharp EL-W516X:
6.93477882*10^95 (default epsilon)
6.93568*10^95 (epsilon = 1*10^-10)

TI-30X Pro MathPrint:
6.934767925*10^95 (default epsilon)
6.93475*10^95 (epsilon = 1*10^-10)

It's kind of annoying that it loses digits by specifying a smaller epsilon, but I guess the TI-30X Pro MathPrint still holds it accuracy better than the Sharp.

That's a bit annoying. It's even worse for yet smaller epsilon:

7.0635e95 (epsilon = 1e-11)
6.42e95 (epsilon = 1e-12)
0 (epsilon = 1e-13)

The sweet spot for this particular evaluation seems to be somewhere around epsilon = 1e-6:

6.93476658e95 (epsilon = 1e-6)

but the operator wouldn't necessarily know that!