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inexact calculation
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I want to find meeting point of
y=0.01x^2 +0.69x +1.5
and
y=0.5x 30
this should give x=66.42 and y=3.21
Goegebra shows for Point F x=66.54 and for y=3.27 !
This is not a big difference but it is a difference that shouldn't be!
Files:
Difference.jpg
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Maybe GoeGebra makes a mistake, but GeoGebra solves it right in three different ways:
1. Assign the equations to functions f and g
2. Draw them as two curves y = ...
3. Use the intersection tool
The results for the points B, D and E are three times the ones you mentions as the exact results, so I presume the program does it all right. Are you sure that the numbers shown in the algebra and the sliders aren't just rounded ones and not the ones you really use in the construction which produces a difference for the intersection point?
chris
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