I dont get limits.

[eat_it]

I need help finding limits for both a fixed number and to infinity. what are the best ways to find these?

 

[ChaoticLlama]

There are many many techniques for both.

Umm.. how about you post a question and we will see what we can do?

For a fixed number you could either directly substitute the value in, or you could factor.

For infinity you typically divide by the highest power of x.

 

[eat_it]

okay, for example find the limit as x approaches infinity for the equation
(2x^2 - 3x)/(4-x)

 

[tkhunny]

okay, for example find the limit as x approaches infinity for the equation
(2x^2 - 3x)/(4-x)

ChaoticLlama gave you a great clue. I'll repeat it.

For infinity you typically divide by the highest power of x.

That would be x^2.

That would give [2 - 3/x] / [4/x^2 - 1/x].

Three out of for chunks head for zero as x increases without bound. What does that tell us?

 

[eat_it]

the limit is....undefined?

 

[ChaoticLlama]

Correct, the limit is undefined, or does not exist.

One important question could be to ask does this function approach positive infinity or negative infinity?