To find the intersection of the two functions – HP 39g Graphing Calculator User Manual

Page 66

Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".

To find the

greater of the two

roots of the

quadratic

function

10. Find the greater of the two roots of the quadratic

function.

Note: Move the cursor to the graph of the quadratic

equation by pressing the 0 or key. Then move the
cursor so that it is near x = -\ by pressing the [►] or

f4~| key.

iSS Select Root

Root

Intersect ion

Slope

Signed area..,

Extremum

mam

The root value is
displayed at the bottom
of the screen.

RDDT: -X.5B5?B6S3?63

To find the

intersection of

the two functions

11. Find the intersection of the two functions.

Ivi .

iRoot 1

Intersection

Slope

Signed area...

Extremum

■ ■

nmm■ HHIM

12. Choose the linear function whose intersection with the

quadratic function you wish to find.

using

Fe>~K?

and

...^

K-fixis

The coordinates of the

intersection point are
displayed at the bottom
of the screen.

Note: If there is more

than one intersection (as
in our example), the coordinates of the intersection point

closest to the current cursor position are displayed.

I-SECT; t-1,3)

BBaai

3-4

Function aplet