HP 15c - Manual (Page 46)

46 Section 2: Working with f
46
Keystrokes Display
® 1.841 -04 Uncertainty of approximation.
)) 1.000 01 Roll down stack until upper
limit of first integral appears in
X-register.
228 228 Keys upper limit of second
integral into X-register. Upper
limit of first integral is lifted
into Y-register, becoming lower
limit of second integral.
´i0 2. 02 Specfiies i0 display format
for quick calculation over
(10,228). If the uncertainty of
the approximation turns out not
to be accurate enough, you can
repeat the approximation in a
display format specifying more
digits.
´f1 5. -04 Integral over (10,228) calculated
in i0.
´i3 5.328 -04 Changes display format back to
i3.
® 7.568 -05 Checks uncertainty of
approximation. Since it is less
than the uncertainty of the
approximation over the first
subinterval, i0 yielded an
approximation of sufficient
accuracy.
® 5.328 -04 Returns approximation and its
uncertainty to the X- and Y-
registers, respectively, before
summing them in statistical
storage registers.
z 2.000 00 Sums approximation and its
uncertainty.
lz 1.000 00 Integral over total interval
(0,228) (recalled from R
3
).
® 2.598 -04 Uncertainty of integral (from
R
5
)
.