Casio fx-CG50 - Page 551

16-11
3(POINTS) ... Select to input the coordinates of three points on a plane.
Inputting a coefficient that matches any of the conditions below will cause an “Invalid Setting”
error.
EXPRESS: a=0 and b=0 and c=0
VECTOR:
Both the u vector and v vector coefficient, or either the u vector or v vector coefficient is
0.
u vector and v vector are the same direction.
POINTS:
Two of the three points are the same value.
The three points are on a straight line.
Sphere Template
There are input screens for two types of coefficients.
1(FACTOR) ... Select to input the coefficients of (X−a)
2
+(Y−b)
2
+(Z−c)
2
=r
2
.
2(EXPAND) ... Select to input the coefficients of X
2
+Y
2
+Z
2
+aX+bY+cZ+d=0.
Inputting a coefficient that matches any of the conditions below will cause an “Invalid Setting”
error.
FACTOR: r = 0 or less
EXPAND: Input coefficients do not satisfy a
2
+b
2
+c
2
>4d.
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u
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