Hp 48g Graphing Calculator Uživatelský manuál stáhnout pdf (Strana 210)

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101

The message is based on the value of ihe equation—the difference

between the left and right sides of an equation, or the value returned

by an expression or program.

If a root is found, the SOLVE application returns a message describing

the root:

Zero The SOLVE application found a point where the

value of the equation is 0 within the calculator’s

12-digit precision.

Siyn Reversal The SOIVE application found two points where

the value of the equation has opposite signs, but

it cannot find a point in between where the value

is 0. This may be because:

■ The two points are neighbors (they differ by 1

in the 12th digit).

■ The equation is not real-valued between the

18 two points. The SOLVE application returns

the point where the value is closer to 0. If

the value of the equation is a continuous real

function, this point is the SOLVE application’s

best approximation of an actual root.

remjn One of the following occurred:

m The SOLVE application found a point where

the value of the equation approximates a local

minimum (for positive values) or maximum (for

negative values). The point may or may not

represent a root.

■ The SOLVE application stopped searching at

±9.9999999999915499, the largest or smallest

numbers in the calculator’s range of numbers.

To obtain more information about the solution:

■ Do any or all of the following:

n Move the highlight to the EQ field and press ExpR= (ENTER). For

an expression or program, the closer the result (labeled E::-ipr:) is

to 0, or for an equation, the closer the two results (labeled Lett s

and Right s) are to each other, the more likely it is that the

SOLVE application found a root. You must use judgement in

considering the results.

18-4 Solving Equations

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Hp 48g Graphing Calculator Uživatelský manuál Strana 210

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