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So How Old Are You?

aXit

aXit

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24.9 (I don't know what you want it rounded to)

I'm uncertain about limits approaching infinity, but I'm pretty sure, and it came out reasonable, so I reckon it's right.
 
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Xplorer877

Xplorer877

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aXit said:
24.9 (I don't know what you want it rounded to)

I'm uncertain about limits approaching infinity, but I'm pretty sure, and it came out reasonable, so I reckon it's right.
Click to expand...

You should get an integer. What did you get for your integrals?

-Tony
 
aXit

aXit

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Ok, it's not 24.9. It's 20. Very nice expression you have there.

sec^2 integral is easy, giving root3, so +3-1 at the end of the expression.

The other integral comes out as tan^-1(e^x) between r and 0. tan^-1 in this sense is the inverse of tan, not cot.

As x -> infinity, e^x -> infinity. tan^-1(infinity) approaches pi/2.

tan^-1(e^0) is tan^-1(1) which is pi/4.

So pi/2 -pi/4 which is pi/4.

74pi/4pi is just 74/4 which is 18. Adding the two from above gives 20.

Just had to have another look at that first integral.
 
Xplorer877

Xplorer877

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aXit said:
Ok, it's not 24.9. It's 20. Very nice expression you have there.

sec^2 integral is easy, giving root3, so +3-1 at the end of the expression.

The other integral comes out as tan^-1(e^x) between r and 0. tan^-1 in this sense is the inverse of tan, not cot.

As x -> infinity, e^x -> infinity. tan^-1(infinity) approaches pi/2.

tan^-1(e^0) is tan^-1(1) which is pi/4.

So pi/2 -pi/4 which is pi/4.

74pi/4pi is just 74/4 which is 18. Adding the two from above gives 20.

Just had to have another look at that first integral.
Click to expand...


Ding Ding Ding!!!!!!!!

Correct! Yes I am 20 years old! Nice job!

-Tony
 
Crazy Jay

Crazy Jay

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Congratulations aXit, you were the only who cared enough to figure it out :p
 
aXit

aXit

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I'll write my own soon. I have a few ideas.

What program did you use to set it out like that?
 
Xplorer877

Xplorer877

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I'm on a math forum too and you can use the forum code to make the notation. Then I just screen captured the image.

(500th post!) :yh:

-Tony
 
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ossumguywill

ossumguywill

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the boglie wavelength of a 1 kilogram object moving at 10 meters a second times 10^35 times 2.2 years divided by a meter. Try and get that one :)
 
hakzaw1

hakzaw1

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Lacrosse ---Oh!!!:undecided: what happened to that little green dot just below 'Rep Power' in your sig??:crackup: Hope you got a good last look at it-- It will be red from now on..you actually look as ignorant in your avatar as you really are.:na:Scamming $400 from Rob???:(:confused: I dont think so..how do you look at yourself in that bathroom mirror---sorry to be insulting-- it is something that i rarely do-- for you I make an exception.---:mad:


'no kind deed goes unpunished' ---hak
 
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