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                            dx用h代替，表示有限的極小的數值。例如: dx = 0.000001,是一個普通的數。并不代表無窮小
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在下面圖像中
![](https://img.kancloud.cn/4f/86/4f862529540c2835196f31328273688e_1409x786.png)
當h->0時，函數沒有極限
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**極限**
當x趨近于某個值時，函數的取值。
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數學將復雜問題分解成簡單的問題,然后看出其中的規律
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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