Casio CFX-9850GC PLUS Manuel graphique - Page 8

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14 - 3

Conic Section Graph Analysis

u u u u u To calculate the latus rectum

u u u u u To calculate the center and radius

200

5 (G-Solv)

1 (FOCS)

(Calculates the focus.)

5 (G-Solv)

4 (VTX)

(Calculates the vertex.)

• When calculating two foci for an ellipse or hyperbolic graph, press e to

calculate the second focus. Pressing d returns to the first focus.

• When calculating two vertexes for a hyperbolic graph, press e to calculate

the second vertex. Pressing d returns to the first vertex.

Example

To determine the latus rectum for the parabola X = (Y – 2)

Use the following View Window parameters.

Xmin

Xmax = 10

Xscale = 1

5 (G-Solv)

5 (LEN)

(Calculates the latus rectum.)

Example

To determine the center and radius for the circle

+ Y

– 2X – 2Y – 3 = 0

Use the following View Window parameters.

Xmin

Xmax = 6.3

Xscale = 1

= –1

Ymin

Ymax = 5

Yscale = 1

= –6.3

Ymin

Ymax = 3.1

Yscale = 1

[G-Solv]-[LEN]

= –5

[G-Solv]-[CNTR]/[RADS]

= –3.1

+ 3