Casio FX-CG10 - Manual (Page 188)

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Example Graph the two functions shown below, and determine the point of
intersection between Y1 and Y2.
Y1 = x + 1, Y2 = x 2
• You can calculate the point of intersection for rectangular coordinate graphs (Y= f ( x ) type)
and inequality graphs (Y
> f ( x ), Y
< f ( x ), Y
≥ f ( x ) or Y
≤ f ( x )) only.
• Either of the following can cause poor accuracy or even make it impossible to obtain
solutions.
- When a solution is a point of tangency between two graphs
- When a solution is an inflection point
u To determine the coordinates for given points
1. Draw the graph.
2. Select the function you want to perform.
!5(G-SOLVE) 6(g)1(Y-CAL) ... y -coordinate for given x
6(g)2(X-CAL) ... x -coordinate for given y
3. If there are multiple graphs on the graph screen, one of them will start flashing. Use f and
c to move the flashing to the graph you want to select and then press w.
4. Input the given x -coordinate value or y -coordinate value.
Press
w to calculate the corresponding y -coordinate value or x -coordinate value.
Example Graph the two functions shown below and then determine the y -
coordinate for x = 0.5 and the x -coordinate for y = 2.2 on graph Y2.
Y1 = x + 1, Y2 = x ( x + 2)( x – 2)
• When there are multiple results for the above procedure, press e to calculate the next
value. Pressing d returns to the previous value.
• The X-CAL value cannot be obtained for a parametric function graph.