HP 40gs Manual do Utilizador descarregar pdf (Página 160)

100

101

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

+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.

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