數學微積分 Precise Definition 的問題

1. lim x->9 根號x =3 利用Precise Definition of limit 來證明題目正確


2.The limit of f(x) as x approaches a is L if there exists a number

ε >0 such that for all δ >0 , I f(x)-L I < ε whenever 0< I x-a I < δ

上述題目是否正確?!是並解釋為何?否並解釋為何或是舉個例子?!

拜託了><!!
更新: 可是正確答案是錯的喔!!!
2 個解答 2