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...B a sc first year mathematics syllabus paper i semester cbcs new differential equations for the batches admitted from hrs unit of order and degree linear reducible to form exact integrating factors change variables simultaneous orthogonal trajectories ii but not solvable p y x that do contain or in clairaut s iii higher solution homogeneous n with constant coefficients non by means polynomial operators method undetermined iv variation parameters cauchy euler equation v system an equivalent triangular degenerate case d reference books their applications zafar ahsan published prentice hall india pvt ltd delhi second edition text book vol krishna murthy others chand company newdelhi ordinary partial raisinghania programs balachandra rao hr andhra university press solid geometry plane terms its intercepts on axis through given points length perpendicular point bisectors angles between two planes combined projection line angle condition may lie lines are coplanar number arbitrary constants ...