7fe98673b3f4618523ef87e2379c7065f3b907ca84f8b98077b4d3c2e4b7e61cf4c608174badc294fafa64c149847d45517c470df4

저 동그라미친 integrand 부분이 왜 A(t)야??
D(t)가들어가야하지않나?!??
아는사람