HP Prime Graphing NW280AAABA manual To find the signed area between the two functions

To find the signed area between the two functions

We’ll now find the area between the two functions in the range –1.3 ≤ x ≤ 2.3 .

1.Tap and select Signed area.

2.Specify the start value for x:

Tap and press Q1.3

E.

3.Tap .

4.Select the other function as the boundary for the integral. (If F1(X) is the currently selected function, you would choose F2(X) here, and vice versa.)

5.Specify the end value for x:

Tap and press 2.3E.

The cursor jumps to x = 2.3 and the area between the two functions is shaded.

6.To display the numerical value of the integral, tap .

7.Tap to return to the Plot menu. Note that the sign of the area calculated

depends both on which function you are tracing and whether you enter the endpoints from left to right or right to left.

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