If y=a cos(log _e x)+b sin(log _e x), then x^2 y_2+x y_1= (a) 0 . (b) y (c) -y (d) none of these

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If y=a cos(log _e x)+b sin(log _e x), then x^2 y_2+x y_1=
(a) 0 .
(b) y
(c) -y
(d) none of these

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