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Does limx→0f(x)exist? If it does, what is it?

Short Answer

Expert verified

The limitlimx→0f(x)does not exist.

Step by step solution

01

Step 1. Graph the function f(x)

We have been givenlimx→0f(x).

Now let us graph the function with the help of a graphing utility.

02

Step 2. Determine if the limit exists. 

For the limit at 0to exist, thenlimx→0-f(x)=limx→0+f(x).

Let us consider the behavior of f(x)nearx=0.

When we consider the limit coming from the left side, orlimx→0-f(x), the function approaches a value of 4.

That islimx→0-f(x)=4

When we consider the limit coming from the right side, orlimx→0+f(x), the function approaches a value of 1.

That islocalid="1647086140473" limx→0+f(x)=1

Sincelimx→0-f(x)≠limx→0+f(x), the limitlimx→0f(x)does not exist.

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