Question
Write an equation that expresses the fact that a function $f$ iscontinuous at the number 4 .
Step 1
According to the definition, a function $f$ is continuous at a number $a$ if the limit of $f(x)$ as $x$ approaches $a$ is equal to the value of the function at $a$, i.e., $\lim _{x \rightarrow a} f(x)=f(a)$. Show more…
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