why does turningpoint return undefined?

Stefan shared this question 3 years ago

Answered

Hi, please see the attached example.

I tried to get the turning points in the function, but the command returns "undefined".

I of course can go via f'' , zero crossings and marking those points manually on f, but it seems such a hassle.

I have tried several functions from the school book and it always returns undefined, so I must be doing something wrong, but what?

Files: vendepunkt.ggb

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Comments (6)

Noel Lambert ● 3 years ago

InflectionPoint( <Polynomial> ) Yields all inflection points of the polynomial as points on the function graph.

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Stefan ● 3 years ago

Hi, the "Vendepunkt" command in my example IS the InflectionPoint command. And in my example gbb, at least in my geogebra, this returns "undefined" for EVERY example function I tried. I have even tried to enter the functions instead of refering to it by name, to no avail.

So I must be doing - something - wrong here, but what?

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Stefan ● 3 years ago

Well, I guess what you meant to say is "You can't use that command, because your function is not a polynomial". That couldn't have been any less clear from writing one word in bold, to me at least. Thanks anyway.

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