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19990401
u To calculate the focus, vertex and latus rectum
[G-SLV]-[Focus]/[Vertex]/[Length]
○○○○○
Example To determine the focus, vertex and latus rectum for the parabola
X = (Y – 2)
2
+ 3
Use the following V-Window settings.
Xmin = –1, Xmax = 10, Xscale = 1
Ymin = –5, Ymax = 5, Yscale = 1
4(G-SLV)
b(Focus)
(Calculates the focus.)
i
4(G-SLV)
d(Vertex)
(Calculates the vertex.)
i
4(G-SLV)
f(Length)
(Calculates the latus rectum.)
•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 an ellipse or hyperbolic graph, press e to calculate
the second vertex. Pressing d returns to the first vertex.
5-11-18
Function Analysis
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