Unformatted text preview: TI 83/4: Finding Maximum and Minimum Points, and Zeros The TI83/4 can be used to find high and low points on a graph, as well as the xintercepts. Consider the graph of the third degree polynomial 3 2 f(x) x 4x 2x 8 = + = + = + = + as shown below. We can see that it has one high point, one low point, and three xintercepts. To find these on the TI83/4: 1) Enter the equation on a “y =” line, choose a window that shows the points of interest, and hit GRAPH. 2) 2 nd CALC 3) The next button depends upon which point we are interested in. If we are looking for an xintercept, we hit #2 ZERO. If we are looking for a low point on a graph, we hit #3 MINIMUM. If we are looking for a high point, we hit #4 MAXIMUM. 4) We now have to give the calculator an interval inside of which the desired point is to be found. The TI83/4 will prompt for a “left bound”, then “right bound”, then “guess”. We use the left and right cursor arrows to maneuver the onscreen cursor to the appropriate positions, hitting ENTER each time to cue the...
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 Fall '08
 Algebra, high point, Low Point

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