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how to draw part of conic?
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Hello,
How can I draw part of a conic, such as a parabola? I need to show the parabola only from its vertex to an intersecting line segment.
Thanks!
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It's fine to use a y=... notation to define a conic c, so you can use the conics related tools on it, e.g. V=Vertex[c], but you need to use a functional notation to define a part of that conic.
Let's say your conic is y=3x^2+2x1
and you want to restrict it to a certain interval, e.g. all its points between the xcoordinate of the previously determined vertex V and the xcoordinate of a previously defined point C.
In the input bar, type
f(x)=3x^2+2x1, x(V)<=x<=x(C)
Now hide the "full" conic by clicking on its visibility marble in Algebra view.
Please note that in Algebra view the two curves you just drew are respectively classified as a conic and a function.
This is major difference in GeoGebra: conics and functions have their reserved tools, so, depending on your goals, you will choose the one or the other notation.
https://ggbm.at/569447
Ah, great! Thanks! :D
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