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...Module ordinary dierential equation dr chandra shekher singh variation of parameters department basic science uptti kanpur india branch tt te apr sem ii outline the presentation dy working rule for solving p qy r dx by where q and rare functions x or constants based examples questions denition wornskian n y is denoted w dened to be dterminant yn example consider two function f nd wronskian i e solution given below sin cos a method producing particular an nonhomogeneous exploiting usually much simpler solutions associated homogeneous procedure pdy are step re write as py...