Higher Secondary Question Paper Solution of Year 2014 Question No: B.(2)(c)(ii)
\(y = a \ cos (log \ x) + b \ sin (log \ x)\) হলে, দেখাও যে \(x^2 \ {d^2y \over dx^2} + x \ {dy \over dx} + y = 0\) যেখানে a এবং b ধ্রুবক |

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