Texas Instruments TI-82 User Manual - Page 83
Using CALC Calculate Operations
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Using CALC (Calculate) Operations Pressing y ãCALCä (above r) accesses a menu with operations you can use to analyze the current graph functions. You are prompted to specify the function(s), interval, and point. CALCULATE Menu CALCULATE 1: value 2: root 3: minimum 4: maximum 5: intersect 6: dy/dx 7: ‰f(x)dx Calculates function value for given X. Finds root of function. Finds minimum of function. Finds maximum of function. Finds intersection of functions. Finds numeric derivative of function. Finds numeric integral of function. value value evaluates currently selected functions for a specified value of X. 1. Select value from the CALC menu. The current graph is displayed, with a prompt for you to enter X. 2. Enter a real value for X between Xmin and Xmax (which can be an expression). Note: When there is a value entered for X, ' clears the value; when there is no value, ' cancels value. 3. Press Í. The result cursor is on the first selected function in the list at the entered X and the coordinate values are displayed (even if you have selected CoordOff on the WINDOW FORMAT screen). 4. Press † or } to move the cursor between functions at the entered X value. When | or ~ are pressed, the free-moving cursor appears. It cannot necessarily move back to the X value. Function Graphing 3-21
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