- #1

- 655

- 0

## Homework Statement

Image here shows the question:

## Homework Equations

## The Attempt at a Solution

I thought the answer would be limit = infinity

I dont understand how to find the limit to this question.

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- Thread starter nukeman
- Start date

- #1

- 655

- 0

Image here shows the question:

I thought the answer would be limit = infinity

I dont understand how to find the limit to this question.

- #2

- 3,472

- 251

## Homework Statement

Image here shows the question:

## Homework Equations

## The Attempt at a Solution

I thought the answer would be limit = infinity

I dont understand how to find the limit to this question.

Try simplifying the expression |4 - x| / (x - 4). Consider two cases separately: x < 4 and x > 4.

- #3

- 655

- 0

Thats what I did. I got to x < 4 and x > 4

After that, what do I do?

After that, what do I do?

- #4

- 655

- 0

isnt this undefined?

- #5

- 3,472

- 251

Thats what I did. I got to x < 4 and x > 4

After that, what do I do?

What were your results?

What is |4 - x| / (x - 4) when x < 4?

What is |4 - x| / (x - 4) when x > 4?

- #6

- 655

- 0

What were your results?

What is |4 - x| / (x - 4) when x < 4?

What is |4 - x| / (x - 4) when x > 4?

My results were -1

- #7

- 3,472

- 251

My results were -1

For both cases? If so, the limit would be -1.

However, you made a mistake in one of the cases.

- #8

- 655

- 0

For both cases? If so, the limit would be -1.

However, you made a mistake in one of the cases.

I did???

- #9

- 3,472

- 251

I did???

You did, if you got -1 for both cases.

To see what went wrong, please answer these two questions:

What does |4 - x| simplify to, if x > 4?

What does |4 - x| simplify to, if x < 4?

Your answers shouldn't contain any absolute values.

- #10

- 655

- 0

What does |4 - x| simplify to, if x < 4?

I am sorry, I dont understand :(

- #11

- 655

- 0

I think what is messing me up is the absolute value bars

- #12

- 252

- 1

|a| = -a if a<0

|a| = a if a>=0

This is what you have to work with.

- #13

- 655

- 0

Ahhh...So, then my calc comes out as -1 and 1, therefore it does not equal so its undefined?

- #14

- 3,472

- 251

Ahhh...So, then my calc comes out as -1 and 1, therefore it does not equal so its undefined?

Correct, the limit from the left doesn't equal the limit from the right, so the overall limit does not exist.

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