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![[parent]](http://images.planetmath.org:8080/images/uparrow.png) Viewing Message
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| ``Re: Small changes/ differential''
by fernsanz on 2007-11-08 09:25:42 |
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| I guess I haven't fully understood the problem because if $a$ is the side which $A$ subtends, then $da/dA=a/A=R$, the radius.
What have I not understood? |
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