HP 39gs User Manual page 68

To find the
extremum of the
quadratic
3-6
15.Move the cursor to x = –2 by pressing the
key.
to accept using F2(x) = (x + 3)
16.Press
other boundary for the integral.
17. Choose the end value
for x.
1
The cursor jumps to
x = –
1 on the linear
function.
18.Display the numerical
value of the integral.
Note: See "Shading
area" on page 3-11
for another method of
calculating area.
19. Move the cursor to the quadratic equation and find
the extremum of the quadratic.
Select Extremum
The coordinates of the
extremum are
displayed at the
bottom of the screen.
or
2
– 2 as the
Function aplet