Differential equations using Series

stosw
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Homework Statement



Given that y1(t) = t is a solution of t2y'' + ty' - y= 0 find all solutions.



The Attempt at a Solution


I already put it into mathbin asking somewhere else for help and it doesn't look like i can copy paste that syntax to here.

http://mathbin.net/56336

Could someone tell me if that is correct so far?
If so can you tell me where to go from there?
If not could you tell me where I made a mistake?

thank you.
 
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After many hours of getting no where, I realized that the correct method to solve this problem is Reduction of order.

The answer is y2(t) = 1/t.
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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