推 keith291 :f(x)=0 g(x)=|x| 在x=0應該就是你要的 03/04 00:34
推 srewq :是台聯大96嗎? 好像有f,g is non-constant function 03/04 00:58
→ srewq :用f(x)=x g(x)=|x| 也可以吧~ 03/04 00:59
→ k6416337 :x and xsin(1/x) at x=0 03/04 01:10
→ k6416337 :那有f跟g都在a點連續但不可微,fg卻可微的例子嗎? 03/04 01:13
推 LimSinE :f(x)=0(x>0),x(x>=0), g(x) = f(-x) f(x)g(x)=0 03/04 01:21
推 plover :f(x) = g(x) = |x| (for k6416337) 03/04 12:40
→ cdader :感謝各位高手指教,3Q 03/04 20:18