uTo calculate the integral value for a given range

Use the following procedure to obtain integration values for a given range. 1. Draw the graph.

2.Press !5(G-SOLVE)6(g)3(dx)1(dx). If there are multiple graphs on the graph screen, one of them will start flashing.

3.Use f and c to move the flashing to the graph you want to select and then press w.

4.Use d and e to move the lower limit pointer to the location you want, and then press w.

5.Use e to move the upper limit pointer to the location you want.

6. Press w to calculate the integral value.

Example

Graph the function shown below, and then determine the integral value

 

at (–2, 0).

 

Y1 = x(x + 2)(x – 2)

You can also specify the lower limit and upper limit by inputting them on the 10-key pad.

When setting the range, make sure that the lower limit is less than the upper limit.

Integral values can be calculated for rectangular coordinate graphs only.

uTo obtain the integration value and area value between two or more roots ofagraph

1.Draw a graph.

2.Press !5(G-SOLVE)6(g)3(dx)2(ROOT).

• The pointer will appear at the leftmost root currently on the graph screen.

• If there is no root on the display, the message “Not Found” will appear. In this case, press

J.

3.Use d and e to move the pointer to the root you want to use as the lowermost side of the integration region, and then press w.

4.Use e to move the pointer to the root you want to use as the uppermost side of the integration region, and the press w.

• If there is only one root on the display, the message “Not Found” will appear. In this case, press J.

5.Press w to calculate the integral value and area value.

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