Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 51

3. Enter an initial guess for the variable for which you are solving. This is optional, but it may help
find the solution more quickly. Also, for equations with multiple roots, the TI-84 Plus will
attempt to display the solution that is closest to your guess.
The default guess is calculated as
4. Edit
bound={lower,upper}
for a solution. This is optional, but it may help find the solution more quickly. The default is
â â
bound={ L 1 99,1 99}
5. Move the cursor to the variable for which you want to solve and press ƒ \.
• The solution is displayed next to the variable for which you solved. A solid square in the
first column marks the variable for which you solved and indicates that the equation is
balanced. An ellipsis shows that the value continues beyond the screen.
When a number continues beyond the screen, be sure to press ~ to scroll to the
Note:
end of the number to see whether it ends with a negative or positive exponent. A very
small number may appear to be a large number until you scroll right to see the exponent.
• The values of the variables are updated in memory.
• is displayed in the last line of the editor.
left rt=diff
N
and right sides of the equation when evaluated at the calculated solution. A solid square in
the first column next to
value of the variable for which you solved.
Editing an Equation Stored to eqn
To edit or replace an equation stored to
press } until the equation editor is displayed. Then edit the equation.
Equations with Multiple Roots
Some equations have more than one solution. You can enter a new initial guess or new bounds to
look for additional solutions.
Further Solutions
After you solve for a variable, you can continue to explore solutions from the interactive solver
editor. Edit the values of one or more variables. When you edit any variable value, the solid
(
upper
---------------------------------------- -
. and are the bounds between which the TI-84 Plus searches
lower upper
.
indicates that the equation has been evaluated at the new
left N rt
when the interactive equation solver is displayed,
eqn
Chapter 2: Math, Angle, and Test Operations
)
+ lower
.
2
is the difference between the left
diff
44