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Question 12:
find a particular solution satisfying the given condition: 
Integrating both sides, we get:
Comparing the coefficients of x2, x, and constant, we get:
Solving these equations, we get 
Substituting the values of A, B, and C in equation (2), we get:
Therefore, equation (1) becomes:
Substituting the value of k2 in equation (3), we get:
