HP 33S User Manual page 4

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HP 33S Solving for roots
To show the checksum and length of this program, press the following in RPN or algebraic mode. Note that
the symbol Õ means to press the right arrow direction of the cursor key at the top of the HP 33S. If you
are unsure of its location, see the image at the end of this training aid.
In RPN or algebraic mode: ¹uÕϺÎ
If the checksum of the program just entered does not equal 23EC, then you have not entered it correctly.
To clear the checksum display press:
In RPN or algebraic mode: ¹£
Then, to exit the program environment, press:
In RPN or algebraic mode: ¹£
Store an initial guess for X of 10 into the variable X. Then set the function to X and solve for the value of X.
Note that the SOLVE function is located on the cursor key area at the top of the HP 33S calculator. If you
are unsure of its location, see the image at the end of this training aid.
In RPN or algebraic mode: 10eXºsXÛX
Since you feel this equation might have a root larger than this, store a new guess for X of 100 into the
variable X. There is no need to set the function to X (since it has already been done). Then solve for the
value of X.
In RPN or algebraic mode: 100eXÛX
The same root is returned. This is a good indication (but certainly not foolproof) that there are no roots
larger than +4 for this equation.
To see if there is a root less than +4 for this equation, store a new guess for X of –10 into the variable X.
Then solve for the value of X.
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Figure 6
Figure 7
Figure 8
HP 33S Solving for roots - Version 1.0