One more Math Question (where the hell is Liq...)

2009-09-07 10:02:57

#1

Ryan: Member; +1,230|7263|Alberta, Canada

Ok, one more here, I'm confused about this one.

I have the following piecewise function:

https://i23.photobucket.com/albums/b386/derish14/piecewise.jpg

Now it asks:

At what points c does only the left-hand limit exist?
At what points c does only the right-hand limit exist?

They say for the left hand, the point is 2, and for the right hand, the point is 0.

To me, it should be the other way around, I don't understand why they are "switching" them...

2009-09-07 10:05:57

#2

m3thod: All kiiiiiiiiinds of gainz; +2,197|7091|UK

The answer is 1.56

Blackbelts are just whitebelts who have never quit.

2009-09-07 10:13:10

#3

Ryan: Member; +1,230|7263|Alberta, Canada

Come on, don't be a dickhead, I want serious answers.

2009-09-07 10:15:27

#4

justice: OctoPoster; +978|7160|OctoLand

You could have just posted in your last thread...Or just make a thread entitled " Do my questions for me" and list them.

I know fucking karate

2009-09-07 10:17:11

#5

CammRobb: Banned; +1,510|6550|Carnoustie MASSIF

You should figure them out for yourself, otherwise you won't learn.

2009-09-07 10:17:15

#6

Brasso: member; +1,549|7050

maybe it's something like:

as you approach x = 0 from the right, the limit goes to 1. there is no limit approaching x = 0 from the left.
as you approach x = 2 from the left, the limit goes to 1. there is no limit apporaching x = 2 from the right. (p.s. - that's the limit as x APPROACHES 2. if you plug in just 2 into the variable you'll get that closed dot, y = 2.)

i think.

"people in ny have a general idea of how to drive. one of the pedals goes forward the other one prevents you from dying"

2009-09-07 10:18:57

#7

Doctor Strangelove: Real Battlefield Veterinarian.; +1,758|6888

Ryan wrote:
Ok, one more here, I'm confused about this one.

I have the following piecewise function:

http://i23.photobucket.com/albums/b386/ … cewise.jpg

Now it asks:

At what points c does only the left-hand limit exist?
At what points c does only the right-hand limit exist?

They say for the left hand, the point is 2, and for the right hand, the point is 0.

To me, it should be the other way around, I don't understand why they are "switching" them...

Left hand means it's going from left to right, right hand from right to left.

It can be confusing since you want to think that left/right limits means that there's a limit at the left/right of the point, but it actually means that left/right is the direction the limit is approaching the point from. And while saying it like that makes less sense from a lay-man's perspective, if you fully understand limits and the way it works than the notation used does make more sense.

tl;dr left hand is at X = 2 and right hand is at X = 0.

2009-09-07 10:21:11

#8

Flaming_Maniac: prince of insufficient light; +2,490|7126|67.222.138.85

When you take the limit from the right, you go from the far right towards the left. <-

When you take the limit from the left, you go from the far left towards the right. ->

It makes a little more sense when you put it in context of a single point. If you want to take the limit from the left at x=1, it makes sense that the negative limit would be on the left.

damnit docta

2009-09-07 11:20:26

#9

Ryan: Member; +1,230|7263|Alberta, Canada

justice wrote:
You could have just posted in your last thread...Or just make a thread entitled " Do my questions for me" and list them.

I did, and didn't get any replies. So I made a new one and left to wash my car, now I am back. I deleted the other thread anyways.

2009-09-07 11:50:40

#10

Ryan: Member; +1,230|7263|Alberta, Canada

I'm still not quite getting it though. I understand that as x approaches a certain value, the limit of f(x) is identifiable. I can figure out the limits, but I don't understand why they are saying the answers are what they are.

2009-09-07 12:27:11

#11

Jebus: Looking for my Scooper; +218|6184|Belgium

math sucks

2009-09-07 15:19:21

#12

Brasso: member; +1,549|7050

Ryan wrote:
I'm still not quite getting it though. I understand that as x approaches a certain value, the limit of f(x) is identifiable. I can figure out the limits, but I don't understand why they are saying the answers are what they are.

3 of us just explained the same thing

"people in ny have a general idea of how to drive. one of the pedals goes forward the other one prevents you from dying"

BF2S Forums One more Math Question (where the hell is Liq...)

Ryan wrote:

justice wrote:

Ryan wrote:

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