Dick
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Jeff12341234 said:Well we got our tests back. The correct answer for part A was (-inf, 0) but he said any of the three intervals could've been used. It was L.I. on the intervals (-inf, 0) U (0, 2/7) U (2/7, inf). I got part A correct on the test.
Part B was really weird. The answer was "any interval that contained the two points" so (-inf, inf) could've been used. I got this part wrong.
Weird stuff..
I don't think the person that composed the questions and answers really understands that "linearly dependent" is different from "wronskian equals zero". The PlanetMath site seemed to have a similar delusion. Hopefully, you do. Someday you might get a test question from someone who does.