If , where are parameters, then…

MATHEMATICS · Single correct · CBSE · Mathematics · Continuity and Differentiability · Continuity and Differentiability

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^2y''+xy' equals (a) yy (b) −y-y (c) 2y2y (d) −2y-2y

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