[填空题]
A particular organ pipe6v5ikhp/( sbp 2v tte7 can t u4+v.y2npg lresonate at 264 Hz, 440 Hz, and 616 Hz, but not at any other frequencies in between. (a) Show why this is an2.tugn v yl4+p open or a closed pipe. (b) What is the fundamental frequency of this pipe? Hz
