HP 15C CE integration

[Idnarn]

Bisecting to illustrate the effect of smaller intervals for this function, this time with Python sympy:

Code:

>>> from sympy import init_printing, Symbol, exp, integrate
>>> init_printing()
>>> x = Symbol("x")
>>> f = exp(-(x**2))
>>> integrate(f, (x, 3, 65)).n()
1.95771932367798e-5
>>> integrate(f, (x, 3, 32)).n()
1.95771932367798e-5
>>> integrate(f, (x, 3, 16)).n()
1.95771932367798e-5
>>> integrate(f, (x, 3, 8)).n()
1.95771932367798e-5
>>>

On the HP 15C CE, with [3, 8] even FIX 4 returned a reasonable solution (1.9458e-05). But I'll remember to use SCI when integrating.