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Add the values $\frac{21}{10}$ and $1$
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$derivdef\left(\frac{31}{10}\right)$
Learn how to solve definition of derivative problems step by step online. Find the derivative of 21/10+1 using the definition. Add the values \frac{21}{10} and 1. Find the derivative of \frac{31}{10} using the definition. Apply the definition of the derivative: \displaystyle f'(x)=\lim_{h\to0}\frac{f(x+h)-f(x)}{h}. The function f(x) is the function we want to differentiate, which is \frac{31}{10}. Substituting f(x+h) and f(x) on the limit, we get. Subtract the values \frac{31}{10} and -\frac{31}{10}. Zero divided by anything is equal to zero.