HP 33S User Manual page 6

Solving for roots

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HP 33S Solving for roots

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 +2 for this equation.

To see if there is a root less than +2 for this equation, store a new guess for X of –10 into the variable X.

Then solve for the value of X.

In RPN or algebraic mode: 10zeXÛX

Answer:

Roots found for the equation are –1.5 and +2. Note that the HP 33S owners manual provides much more

information about providing initial guesses for the SOLVE feature.

The next page of the training aid contains a picture indicating the location of the cursor keys and functions used in this

document.

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Figure 12

Figure 13

Figure 14

HP 33S Solving for roots - Version 1.0