[Rivalry]

[img]http://s9.postimg.org/57pm7cwxr/LEGENDS_2_0_HEADER.png[/img]
"Others toil their entire lives to make a name for themselves, some are just born LEGENDS."

Hey all!

On behalf of Legends, I'd like to present our education helpdesk. We're here to answer any and all of your academic problems, whether you attend high school, college, or university.

Do note that this is NOT a homework completion service. We will NOT be completing assignments or projects for you. Do not contact us if this is what you're looking for. We're here to offer advice on education more generally, and to try and help you out with anything in school you may be struggling with.

[img]http://s9.postimg.org/jzubyp2v3/LEGENDS_2_0_DELIMETER.png[/img]

Members
Rivalry - UK education system, UK university applications (incl. personal statements, interviews, Oxbridge, and UCAS), EPQ, revision strategies, humanities, English, literature, German, geography, politics, history (esp. 20th century and Renaissance), rhetoric/critical thinking/debating, theology
The J0ker - maths, geometry, algebra, trigonometry etc
Raymond Reddington - general assistance
Travis Bickle - English, business studies, economics, drama
j1nx0 - computing, computer engineering, adapting to new school
Epicur - maths, algebra, probability, estadistics, physics, electronics, coding

[img]http://s9.postimg.org/jzubyp2v3/LEGENDS_2_0_DELIMETER.png[/img]

Things we can help you with on this thread:

- Feedback and CnC on work (incl. proof-reading)
- Applying to university/college
- Help with understanding concepts, books, poems, maths problems etc
- Time management
- Revision
- Dealing with stress/mental health issues arising from work
- Extra-curricular activities
- Subject choices
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- Referencing and citations (incl. good places to find sources)
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Things we cannot help you with:

- Halp pls some1 do my hwk im lazy lol
- how can i cheat on exam??
- how can i plagirasise and not get caughted?
- Hardcore topiary

Got a question? We're here to help! Drop it below or PM one of us. Things PM'd to us will be automatically classed as confidential and will not be shared :)

[Travis Bickle]

If anyone has any questions on English, Business Studies, Economics or Drama; please feel free to PM me :)

[Ooze]

I know finals are coming up boys, shoot me a PM or reply here if you have any questions, Ill try to help if its Math Related.
Subscribing to the thread now

[Rivalry]

Added j1nx0 to the helpdesk! He can help with any computing queries you may have. Exam season is fast approaching...

[Epicur]

I'm glad to be able to help you out guys! Have been studying my degree for 3 years and almost have my degree now.

Don't hesitate to ask, I'll be happy to answer.

[Ooze]

Don't worry guys this is still available,
I already helped some people with math.

[Tɦɛ Gʀiɱ]

Anyone good with engineering graphics by any chance?

[Travis Bickle]

Anyone good with engineering graphics by any chance?

Not at that I know of, I'll ask in the sf.

[webdev77]

Any chance someone can let me know where I went wrong on this Laplace IVP? I have looked at it a few dozen times and there has got to be a sign error or some other small error somewhere in there.

the problem and work (Click to View)
y" + 4y' + 6y = 1 + e^-t
Initial conditions:
y(0) = 0
y'(0) = 0

Work
L{y"} + 4L{y'} + 6L{y} = L{1} + L{e^-t}
s^2Y(s) - sy(0) - y'(0) + 4[sY(s) - y(0)] + 6Y(s) = (1/s) + [1/(s+1)]
(s^2 + 4s + 6)Y(s) = (2s + 1) / [s(s+1)]
Y(s) = (2s+1) / [s(s+1)(s^2 + 4s + 6)]
Y(s) = (1/6)/s + (1/3)/(s+1) - [(s/2) + (5/3)]/s^2 + 4s + 6

y(t) = (1/6)L^-1{1/s} + (1/3)L^-1{1/(s+1)} - 1/2L^-1{(s+2)/[(s+2)^2+2]} + 2/[3(sqrt(2))]L^-1{sqrt(2) / (s+2)^2 + 2}
y(t) = 1/6 + 1/3e^-t - 1/2e^(-2t) cos(sqrt(2)t) + sqrt(2)/3*e^-2t sin(sqrt(2)t)

[Gen0gar]

Any chance someone can let me know where I went wrong on this Laplace IVP? I have looked at it a few dozen times and there has got to be a sign error or some other small error somewhere in there.

the problem and work (Click to View)
y" + 4y' + 6y = 1 + e^-t
Initial conditions:
y(0) = 0
y'(0) = 0

Work
L{y"} + 4L{y'} + 6L{y} = L{1} + L{e^-t}
s^2Y(s) - sy(0) - y'(0) + 4[sY(s) - y(0)] + 6Y(s) = (1/s) + [1/(s+1)]
(s^2 + 4s + 6)Y(s) = (2s + 1) / [s(s+1)]
Y(s) = (2s+1) / [s(s+1)(s^2 + 4s + 6)]
Y(s) = (1/6)/s + (1/3)/(s+1) - [(s/2) + (5/3)]/s^2 + 4s + 6

y(t) = (1/6)L^-1{1/s} + (1/3)L^-1{1/(s+1)} - 1/2L^-1{(s+2)/[(s+2)^2+2]} + 2/[3(sqrt(2))]L^-1{sqrt(2) / (s+2)^2 + 2}
y(t) = 1/6 + 1/3e^-t - 1/2e^(-2t) cos(sqrt(2)t) + sqrt(2)/3*e^-2t sin(sqrt(2)t)

you only forgot a - sign on the last term.
it's: y(t) = 1/6 + 1/3e^-t - 1/2e^(-2t) cos(sqrt(2)t) - sqrt(2)/3*e^-2t sin(sqrt(2)t)

---

Anyone good with engineering graphics by any chance?

What type of engineering graphics ?
Mechanical, electrical, civil ....

[Louis C.K.]

https://hackforums.net/showthread.php?tid=5264185
in need of an essay revision. I am running out of time, any help would be great

[webdev77]

you only forgot a - sign on the last term.
it's: y(t) = 1/6 + 1/3e^-t - 1/2e^(-2t) cos(sqrt(2)t) - sqrt(2)/3*e^-2t sin(sqrt(2)t)

Thank you, I greatly appreciate that.