>>syms a t s

>> q
 
q =
 
1/(s^2+1)^2
 
 
>> pretty(q)
 
                                       1
                                   ---------
                                     2     2
                                   (s  + 1)
 
>> v=ilaplace(q)
 
v =
 
1/2*sin(t)-1/2*t*cos(t)
 
 
>> laplace(v,s)
 
ans =
 
1/2/(s^2+1)-1/2/(s^2+1)^2*(-1+s^2)



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질문. q를 역 라플라스 변환 해서 v에 집어넣고 다시 v 를 라플라스 변환 했는데
      두 값이 서로 다릅니다 무엇이 문제 인가요????