Integration Problem

第一題如果是由 -∞ 至 +∞ 就是 π，我上次解釋過。

你看看你的 integration limits 是什麼。

2014-11-19 22:22:29 補充：
https://tw.knowledge.yahoo.com/question/question?qid=1014083003741

2014-11-19 22:23:59 補充：
https://www.wolframalpha.com/input/?i=integrate+%28from+-infinity+to+infinity%29integrate+%28from+-infinity+to+infinity%29+sin%28xy%29%2F%28xy%29+dxdy

The second integral does not converge.

2014-11-27 03:03:01 補充：

圖片參考：https://s.yimg.com/rk/HA00430218/o/788701893.png


The second integral ∬ sin(xy) / (xy) dydx does not converge, as mentioned in the Comment Box.