13-6
Using mathematical functions
Example
2^8
returns
256
ABS
Absolute value. For a complex number, this is
.
ABS
(
value
)
ABS
((
x
,
y
))
Example
ABS(–1
)
returns
1
ABS((1,2))
returns
2.2360679775
Takes the
n
th root of
x
.
root
NTHROOT
value
Example
3
NTHROOT
8
returns
2
Calculus functions
The symbols for differentiation and integration are
available directly form the keyboard—
and S
respectively—as well as from the MATH menu.
Differentiates
expression
with respect to the
variable
of
differentiation. From the command line, use a formal
name (S1, etc.) for a non-numeric result. See “Finding
derivatives” on page 13-21.
variable
(
expression
)
Example
s1(s1
2
+3*s1)
returns
2*s1+3
Integrates
expression
from
lower
to
upper
limits with
respect to the
variable
of integration. To find the definite
integral, both limits must have numeric values (that is, be
numbers or real variables). To find the indefinite integral,
one of the limits must be a formal variable (s1, etc).
(
lower, upper, expression, variable
)
See “Using formal variables” on page 13-20 for
further details.
x
2
y
2
+
n
∂
∂
∂
∫
∫
hp40g+.book Page 6 Friday, December 9, 2005 1:03 AM
Summary of Contents for 40gs
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