Question: 3. (a) Let y be, a function of r. By using a suitable integrating factor, find a general solution to {1 (1) (2 +

3. (a) Let y be, a function of r. By using a

3. (a) Let y be, a function of r. By using a suitable integrating factor, find a general solution to {1 (1) (2 + 1). dy (ii) dy + xy = C dx 8. e dy (iii) (25 marks) tan x = sec x, x > 0. dx

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