問題詳情

3. Consider the integral

dA, where D is the region bounded by two concentric circlescentred at the origin with radi r and 1 respectively, 0＜" ＜ 1. Let

. 
(a)Jpn is convergent if p ＜ 1.
(b) Jp is convergent if 1 ＜p ＜2.
(c) Jp is convergent if 2 ＜ p. 

Among the above three statements, how many of them are true?
(A)Only one.
(B) Only two.
(C)All of them.
(D) None of them.

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增