Undefined when trying to find intersection with geogebra 5 classic
Not a Problem
I get "Undefined" when trying to find intersection between F(x)=0.987^x and y=30000. Seems to be a problem for the specific value of 30000, if I change to y=30000.01 it works just fine. See attached screenshot for version number. (Pretty sure it's the latest version.)
The same problem 
try
Intersection(F, f, -1000, 0)
Also try
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