Find the general solution of the following differential equation, by separating the variables: ydy-(1 +y2)x? =0. [5 marks] Question 2 Use an integrating factor to find the general solution of the following differential equation: dy 2 de-ry = 6x2 [6 marks] Question 3 Find the curve that passes through the point (1, 3) and whose tangent line at has slope: - [9 marks]