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(a) Solve the differential equation x+ + xy - sec(xy). (5) dx (b) Find the general real solution of -4 x5 + In2 +

(a) Solve the differential equation x+ + xy - sec(xy). (5) dx (b) Find the general real solution of -4 x5 + In2 + e4xsin5x. (5) dx3 dx (c) Find general solution of x*yiv+6x3y" + 2x2y" - 4xy' + 4y = x cos3x.(10)

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