Mathematics

Mathematics

Problem

If y=acos⁡(log⁡x)+bsin⁡(log⁡x)y = a \cos(\log x) + b \sin(\log x) , where a,ba, b are parameters then x2y′′+xy′=x^2 y'' + xy' = (a) yy (b) −y-y (c) 2y2y (d) −2y-2y

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