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这里a_i(i=1,2,…,n)是常数,f(t)是连续函数,当f(t)具有某种特殊形状时,可以使用“比较系数法”来求得(A)的特解。这就是下面的定理:对于(A),
Here f (t) is a continuous function, and when f (t) has some special shape, we can use the “comparative coefficient method” to get the value of Special solution. This is the following theorem: For (A),