📖Glossary📖
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Differentiable function : A function is called differentiable if $\lim \limits_{h\to 0}\frac{f(x+h)-f(x)}{h}$ exists for every $x.$
Here is your desired excerpt from our glossary
Differentiable function : A function is called differentiable if $\lim \limits_{h\to 0}\frac{f(x+h)-f(x)}{h}$ exists for every $x.$