(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

'Use differentiation to prove that as the radius of the base of a cone increases, the height of the cone decreases.'

2. Relevant equations

The height has been previously calculated as:

h = (507 - 2pi r^3) / pi r^2

3. The attempt at a solution

I have worked out that:

h' = (-1014 - 2pi r^3) / pi r^3

I'm just not sure how to do the proving section though. I can do it without differentiating by replacing values for r in the h equation and also by graphing the h equation, but that doesn't answer the question as differentiation is not used. Any help would be greatly appreciated!!

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# Homework Help: Using differentiation to prove

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