HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 90
Solve aplet's NUM view keys
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hp40g+.book Page 4 Friday, December 9, 2005 1:03 AM 6. Plot the equation for variable A. Select Auto Scale 7. Trace along the graph representing the left side of the equation until the cursor nears the intersection. 20 times Note the value of A displayed near the bottom left corner of the screen. The Plot view provides a convenient way to find an approximation to a solution instead of using the Numeric view Solve option. See "Plotting to find guesses" on page 7-7 for more information. Solve aplet's NUM view keys The Solve aplet's NUM view keys are: Key Meaning Copies the highlighted value to the edit line for editing. Press when done. Displays a message about the solution (see "Interpreting results" on page 7-6). Displays other pages of variables, if any. Displays the symbolic definition of the current expression. Press when done. Finds a solution for the highlighted variable, based on the values of the other variables. 7-4 Solve aplet