Asked by Muhammad Talha

solve xd^2y/dx^2+y=0 by frobenius method
Answered by oobleck
you want to express y as a power series in x, and then differentiate term by term. Plug into your DE, and find the condition where the series sums to zero.

google provides a number of discussions, examples and videos. If you stay stuck, come back with what you have so far.
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