Help with an integral that has differentials inside of it

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The discussion centers on solving a differential equation using double integration techniques. The user identifies the general solution as T(r) = A*ln(r) + B, where A and B are constants. The conversation emphasizes the importance of mastering calculus concepts, particularly in the context of differential equations and integration methods. The user seeks assistance in refining their calculus skills to effectively tackle the problem presented.

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enerj
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So my calculus isn't as sharp as I'd like it, and I am having trouble solving this diff eq, and I know the correct method is double integration. I also know the general solution to be

T(r) = A*ln(r) + B , A and B are constants

Thanks in advance
 

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