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Determine if the function F(x) = (x2 − 6x + 5) / (x2 - 4x + 3) has a removable discontinuity at x=1.
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| Point | x | y |
|---|---|---|
| y-intercept | 0 | 1.67 |
| x-intercept | 5 | 0 |
Step-by-step solution
3 stepsA removable discontinuity occurs at a point if the function is undefined, but the limit exists.
Let's analyze the given example: at .
Evaluate .
Substitute into the function:
Since we have an indeterminate form , is undefined.
Evaluate the limit as .
To evaluate the limit , we factor the numerator and the denominator.
Factor the numerator :
We look for two numbers that multiply to 5 and add to -6. These are -1 and -5.
So, .Factor the denominator :
We look for two numbers that multiply to 3 and add to -4. These are -1 and -3.
So, .Now, substitute the factored forms into the limit expression:
Since , , so we can cancel the terms:
Now, substitute into the simplified expression:
The limit exists and is equal to 2.
Conclude the type of discontinuity.
Since is undefined but exists (it equals 2), the function has a removable discontinuity at .
The steps shown in your notes are correct.
The function has a removable discontinuity at . The value that would make the function continuous at is .
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