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Unformatted text preview: lays the one closest to
zero. However, the displayed solution has no financial meaning. Thus, you
should use caution in making investment decisions based on an IRR
computed for a cash-flow stream with more than one sign change.
The following time line shows a sequence of cash flows with three sign
changes. There may be one, two, or three solutions for IRR.
change When Solving a Complex Problem
When you are solving very complex cash-flow problems, the calculator may
not be able to find IRR even if a solution exists. When this is the case, the
calculator displays Error 7 (iteration limit exceeded). 84 Appendix A: Reference Information The Algebraic Operating System (AOS )
If you select AOS (rather than Chn) as the calculation method in the
Format worksheet, the calculator uses the standard rules of algebraic
hierarchy to determine the order in which operations are performed. Algebraic Hierarchy
The table below shows the order in which operations are performed when
AOS is selected as the calculation method.
Priority Operations 1 (highest) x 2, x!, 1/x, %, 2 nCr, nPr 3 yx 4 ,P 5 +, - 6 ) 7 (lowest) x, LN, e 2, HYP, SIN, COS, TAN = Battery Information
The calculator uses one lithium manganese battery for about 1500 hours of
operation. You must replace the old battery with Union Carbide (Eveready)
CF2032, Duracell DL2032, or the equivalent. Knowing When to Replace the Battery
If the display begins to dim (especially during calculations), it is a sign that
the battery is starting to weaken.
When you find it difficult to read the display under normal viewing
conditions, the remaining battery life may be only about one week. Effects of Replacing the Battery
The calculator cannot retain data when the battery is removed or becomes
discharged. Replacing the battery has the same effect as resetting the
calculator with the
key sequence. Appendix A: Reference Information 85 Replacing the Battery
To replace the battery, follow these steps:
1. Turn the calculator off and turn it over so that the back is facing you.
2. Place your thumb on the battery cover where it is marked with raised
lines. Press and slide until the...
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- Summer '09