Yahoo奇摩 網頁搜尋

Proof. Let f_k_j be a subsequence of f_k converging to f a.e. By Fatou...

Let r.v. X is the number of boxes that he should buy...

Let x1=y1-y3, x2=y2-y3. Then x1, x2 are solutions to the homogeneous...

Let φ be a test function. Since f = 1(0,1) a.e., we have 〈f ', &phi...

...x|<ε 即 x(N+1), x(N+2), ... contained in the B(X, x)=ε (<=) 設B(X, x)= r...

(=>) Let { X_k(i) } i=0~∞ be a subsequence of {X_k} and lim(i->...+1), .... (infinite many values) are contained in B(x, ε) (<=) For any ball B(x, 1...

Let ε＞０ be given, f is continuous at c, choose &delta...

http://frankmath.cc/UCD/HWC1.pdf 看一下第三題，第三題就是你的問題了。 還好現在都有習慣把他打起來，這樣累積起來，問題要是重複，答案也可以重複使用。阿豪你也試著打Latex吧。