→ a88241050 :對 10/30 19:47
→ zi6ru04zpgji:chain rule 10/30 19:49
推 mickeyjan :分子F'(x) 10/30 20:03
推 JAPTX4869 :F(x)≠0 and F'(x) is differentiable 10/30 20:06
→ JAPTX4869 :分子是F(x)= = 10/30 20:07
→ zi6ru04zpgji:樓上 分子是F'(x)吧@@ 10/30 20:15
推 PaulErdos :F(x)本來就不會是0了 10/30 20:53
→ zi6ru04zpgji:F(x)=3x , F(3)=0 10/30 20:58
推 rygb :P大想表達的應該是 F(X)能取對數 本身就不能是零 10/30 21:00
→ zi6ru04zpgji:對吼 這我倒是沒想過@@ 10/30 21:04
推 profyang :應該就是反正令F(x)等於零的點本來就不在定義域了 10/30 21:33