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Let y = y(x) be a solution of the differ...

Let `y = y(x)` be a solution of the differential equation `(xcosx)dy + (xysinx + ycosx – 1)dx = 0, 0< x< (pi)/2` If `pi/3y(pi/3)=sqrt 3 ,` then `|pi/6y''(pi/6)+2y'(pi/6)|` is equal to __.

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