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**Term Test 1 / Re: Problem 2 (morning)**

« **on:**October 28, 2019, 06:03:16 PM »

Do we need to consider (or simply analyze) the situation x = 0? Since all solutions here are based on x=0.

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Do we need to consider (or simply analyze) the situation x = 0? Since all solutions here are based on x=0.

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In the 10th line, by formula $\int \frac{1}{x} = ln|x|+C$, how can we identify $u+1 \geq 0, x \geq 0$?

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