HP 40gs - Manual (Page 160)

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 nth 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
∂
∂
∂
∫
∫
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