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Need help with Calculus problem
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Sunbourn Offline
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Post: #1
Need help with Calculus problem

I have a Calculus test on Tuesday and I'm going through the practice test for it. There's one problem on there which I really don't understand at all. We worked through it today in my class and determined the limit is e^2.5. Putting it in to wolfram alpha shows that the answer we got for the two-sided limit is actually only the limit for the right side though! It says that from the left it is 1. If anybody has an explanation on how to solve it that would be great because whenever I try I just get lost in a sea of math without a paddle or sail.

It's also worth noting that the first time our professor worked through it he actually got that the limit is infinity. Basically, even our professor isn't even 100% on this problem and I'm skeptical of even his 2nd answer in light of Wolfram Alpha calculating that his answer is only for one side.

Use l'Hopital's rule to find the limit.

lim (e^(5/x)-6x)^(x/2)
x->0

a) 0 b) e^2.5 c) 1 D) infinity e) 2.5

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(This post was last modified: 11-15-2013 07:53 PM by Sunbourn.)
11-15-2013 07:51 PM
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Heil_Kaiba8921 Offline
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Post: #2
RE: Need help with Calculus problem

fuck yo calculus. ain't nobody got time fo' dat.

Seriously though I have absolutely no idea about calculus...I could help you with algebra or HTML though.

The less you try to control things, the less you need to.

Boredom is the #1 enemy of learning. Therefore, school is the #1 enemy of learning.

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"free speech under the constitution only guarantees the government won't stop him saying it and does not guarantee his right to say things and have no consequences at all as a result. also i completely doubt that he is motivated solely by "i'm saying it because i can" and is probably motivated by a more shitheady motive like "i think it's funny to annoy people and Rustle Le Jimmies™ and is just hiding behind the first amendment to try to deflect any consequences or make you realize that being allowed to annoy people is a superior moral right. you can still disdain someone for doing things for dumbarse wankery purposes and you have evne more right to ban and insult them for it" ~Trar's friend about Potato.

Thanks for the diploma… can I have my childhood back?

I’d love to have a battle of wits with you… but I hate to fight the unarmed.
11-16-2013 04:59 AM
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no Offline
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Post: #3
RE: Need help with Calculus problem

The answer is 42

Hello, traveler.

This is an ancient account I have not used in a long time. My views have changed much in the intervening months and years.

Nonetheless, I refuse to clean it up. Pretending that I've held my current views since the beginning of time is what we in the industry call a lie. Asking people to do so contributes to moralistic self-loathing. "See, those people have nothing damning! I do! I'm truly vile!"

Because you can never be a good person with a single blemish on the moral record, I thought that simply entertaining some thoughts made me irredeemable. Though I don't care for his writing style, William Faulkner presents a good counterexample. He went from being a typical Southern racist to supporting the civil rights movement. These days we'd yell at him for that, probably.

People are allowed to change their views.

Nevertheless, this period of my life has informed some of how I am today. In good ways and bad ways. To purge it would be to do a disservice to history. Perhaps it will not make anyone sympathetic, but it may help someone understand.

If, after reading all this, you still decide to use the post above as evidence that I am evil today, ask yourself if you have never disagreed with the moral code you now follow. In all likelihood you did, at some point. If some questions are verboten, and the answer is "how dare you ask that," don't expect your ideological opponents to ever change their minds.
11-16-2013 06:52 AM
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Heil_Kaiba8921 Offline
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Post: #4
RE: Need help with Calculus problem

(11-16-2013 06:52 AM)planetfall666 Wrote:  The answer is 42

I actually did use this on some of my tests. I don't remember what class, but I did turn in a test with just a great big 42 on it...it was probably my first try at algebra 2 honestly, I didn't understand shit and the teacher didn't give a fuck either.

The less you try to control things, the less you need to.

Boredom is the #1 enemy of learning. Therefore, school is the #1 enemy of learning.

"Bodies fucking fuck."~Night.Artist

[Image: 41433.png][Image: 14362714_1336391025.png]

Hidden stuff:
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Hidden stuff:

"free speech under the constitution only guarantees the government won't stop him saying it and does not guarantee his right to say things and have no consequences at all as a result. also i completely doubt that he is motivated solely by "i'm saying it because i can" and is probably motivated by a more shitheady motive like "i think it's funny to annoy people and Rustle Le Jimmies™ and is just hiding behind the first amendment to try to deflect any consequences or make you realize that being allowed to annoy people is a superior moral right. you can still disdain someone for doing things for dumbarse wankery purposes and you have evne more right to ban and insult them for it" ~Trar's friend about Potato.

Thanks for the diploma… can I have my childhood back?

I’d love to have a battle of wits with you… but I hate to fight the unarmed.
11-16-2013 07:16 AM
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Sunbourn Offline
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Post: #5
RE: Need help with Calculus problem

(11-16-2013 04:59 AM)Heil_Kaiba8921 Wrote:  fuck yo calculus. ain't nobody got time fo' dat.

Seriously though I have absolutely no idea about calculus...I could help you with algebra or HTML though.

I already know that stuff bro. Is there nobody on here skilled in calculus?

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11-16-2013 12:56 PM
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Gwedin Offline
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Post: #6
Need help with Calculus problem

nah bro we all dnt no shit bout dat sm4rt stuf dat 4 dem rich folk who getn te dem hiyer edukayshin n watnot
11-16-2013 04:22 PM
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thewake Offline
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Post: #7
Need help with Calculus problem

Calculus is the bane of my existence currently.

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11-16-2013 04:24 PM
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Heil_Kaiba8921 Offline
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Post: #8
RE: Need help with Calculus problem

(11-16-2013 12:56 PM)|55555| Wrote:  
(11-16-2013 04:59 AM)Heil_Kaiba8921 Wrote:  fuck yo calculus. ain't nobody got time fo' dat.

Seriously though I have absolutely no idea about calculus...I could help you with algebra or HTML though.

I already know that stuff bro. Is there nobody on here skilled in calculus?

The likeliest candidate would be Soul, and even then that's only because she's the oldest.

The less you try to control things, the less you need to.

Boredom is the #1 enemy of learning. Therefore, school is the #1 enemy of learning.

"Bodies fucking fuck."~Night.Artist

[Image: 41433.png][Image: 14362714_1336391025.png]

Hidden stuff:
[Image: asschart.jpg]
Hidden stuff:

"free speech under the constitution only guarantees the government won't stop him saying it and does not guarantee his right to say things and have no consequences at all as a result. also i completely doubt that he is motivated solely by "i'm saying it because i can" and is probably motivated by a more shitheady motive like "i think it's funny to annoy people and Rustle Le Jimmies™ and is just hiding behind the first amendment to try to deflect any consequences or make you realize that being allowed to annoy people is a superior moral right. you can still disdain someone for doing things for dumbarse wankery purposes and you have evne more right to ban and insult them for it" ~Trar's friend about Potato.

Thanks for the diploma… can I have my childhood back?

I’d love to have a battle of wits with you… but I hate to fight the unarmed.
11-16-2013 10:59 PM
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brainiac3397 Offline
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Post: #9
Need help with Calculus problem

I have yet to re-educate myself in Calculus...

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(06-14-2013 08:02 AM)Potato Wrote:  watch the fuq out, we've got an "intellectual" over here.

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11-17-2013 03:22 AM
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Sunbourn Offline
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Post: #10
RE: Need help with Calculus problem

I FIGURED IT OUT IN A BENADRYL HAZE.

It's e^2.5.

lim (e^(5/x)-6x)^(x/2)
x->0

ln(e^(5/x)-6x)/(2/x)

take derivatives

((1/(e^(5/x)-6x))*((-5/x^2)e^(5/x)-6))/(-2/x^2)

smoke a phat blunt

(((-5/x^2)e^(5/x)-6)/(e^(5/x)-6x))*(x^2/-2)=

((-5e^(5/x)-6x^2)/(-2(e^(5/x)-6x)))*((e^(-5/x))/(e^(-5/x))=

(-5-(6x^2)e^(-5/x))/(-2-6xe^(-5/x))

plug in 0 since finding lim as x --> 0

-5/-2=5/2

since we solved with natural logarithms the answer is actually e^(5/2) or e^(2.5), answer choice B!

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(This post was last modified: 11-19-2013 03:35 PM by Sunbourn.)
11-19-2013 03:33 PM
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Gwedin Offline
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Post: #11
Need help with Calculus problem

Thus raising the age-old question: How the fuck is this gonna help me in real life?
11-19-2013 04:20 PM
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Subb Offline
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Post: #12
RE: Need help with Calculus problem

(11-19-2013 04:20 PM)Gwedin Wrote:  Thus raising the age-old question: How the fuck is this gonna help me in real life?

You need it if you're gonna be an engineer or a scientist. If you're not gonna do that, it doesn't do shit.

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11-19-2013 04:29 PM
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Sunbourn Offline
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Post: #13
RE: Need help with Calculus problem

Future comp sci major here. I probably need it.

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11-19-2013 04:31 PM
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brainiac3397 Offline
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Post: #14
RE: Need help with Calculus problem

Well, I think engineers and mathmaticians find it useful. I wouldnt know what use it would be to any other(though maybe somewhat finance/economics in the statistics area, but not to extent of engineers and mathmaticians)

Math is pretty much the language of science, but if you dont need to speak it then there isnt much reason to learn beyond algebra I guess(Algebra does help in ways since it teaches math of undefined variables and defining them. Ive found that algebra also kind of changes the way you think like some form of mathematic reasoning. Thats my opinion)

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(06-14-2013 08:02 AM)Potato Wrote:  watch the fuq out, we've got an "intellectual" over here.

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11-19-2013 04:33 PM
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Gwedin Offline
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Post: #15
Need help with Calculus problem

I knew what it was helpful for. Hence why I said "how is it gonna help me?". I have no intention of entering any of those careers yet for some dumbass reason I chose it as a subject. Probably because it was either that or statistics. Razz

I'm not sure about the US but over here some form of maths is required to be taken every year (next year it branches off into calc and statistics). Why it's compulsory IDK.
11-19-2013 06:20 PM
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brainiac3397 Offline
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Post: #16
RE: Need help with Calculus problem

I know in college the math branches off deoending on what you are studying, and is generally handled in your first year. If you do science or engineering or math then you'll pretty much have a math course every semester, or even a form of two(calc+physics w/calc). Just to be nice, they will let you pick what type of high level math after your second year, like asking if you'd like a hammer to the head or a brick.

Business economy and finance people get the head bashing statistics and economics itself has its own math, but it beats the stuff the science people do.

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(06-14-2013 08:02 AM)Potato Wrote:  watch the fuq out, we've got an "intellectual" over here.

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11-20-2013 04:55 AM
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James Comey Away
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Post: #17
Need help with Calculus problem

FRESH MEEEAAATTTTT!!!!!!

I seriously can't believe you've returned.

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Stop jerking off to porn and whining and do something about it

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(This post was last modified: 12-10-2013 11:24 AM by James Comey.)
12-10-2013 11:23 AM
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