In the uploaded file, question 11 says that in b) the solutions y(adsbygoogle = window.adsbygoogle || []).push({}); _{1}and y_{2}are linearly independent but the Wronskian equals 0. I think it said that they are independent because it's not a fixed constant times the other solution (-1 for -1<=t<=0 and 1 for 0<=t<=1) but it clearly says in the textbook that the two solutions are linearly independent if and only if Wronskian equals 0.

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# Wronskian and two solutions being independent

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