#math - Mon 30 Apr 2007 between 00:00 and 00:22

NY Lost Funds



sumptanyone have a site showing the derivation of the partial sum formula for an arithmetic series?
Ransomi cant see how you are getting x alone
medflyRansom: 7*3.5*m / x = 1
Ransommeh i gotta draw it i dont get it..
Squall`for the first 4 terms of Gamma(1), I got lim k-> infinity e^-t (x + log t / (2 * 1!) (x-1)^2 + log ^2 t/(3 * 2!) (x-1)^3 + log ^ 3 t / (4 * 3!) (x-1)^4) from k to 0, but it doesn't seem like that would converge. Did I do something wrong?
TRWBWSquall`: no idea, are you doing Gamma(1+t)?
Squall`you mean Gamma(1, t)?
TRWBWwell you got a t and and x in there and a k too, not sure what you are saying
Squall`okay, let me backtrack a bit
oh ffs
I integrated with respect to the wrong variable
ahhhh
all that work, wasted
man, that's depressing
Ransomoh okay i figured it out
i was thinking recipocal so do 7m/x * x/7m
but x/1...
jamisnemoI've been trying to solve a differential equation but I can't find the answer anywhere. I need to find a general solution to x^2y''+7xy'+8y = 0 but I do not have a solution to the dif eq to use reduction of order
could anyone help me out?
Squall`*sniff sniff* at least it erased cleanly
Kasadkadjamisnemo: Isn't that one of those where the substitution x = e^t helps?
jamisnemoit may be... I'll try that out now
my head is all lost on this now
Squall`What kind of sadist makes x a constant?
BrendanMhaha
KasadkadIt's not a constant, it's a change of variable
http://en.wikipedia.org/wiki/Cauchy-Euler_equation
Squall`I'm not talking about his problem.
I'm talking about mine
haha
jamisnemo:P
KasadkadAh
jamisnemoI'll walk through it again
at least I have a better idea as to where to start
Squall`I wasted like an hour of weird series expansion and integration because I integrated in respect to x, which was a CONSTANT!!!!! AHH!!!
medflyi feel your pain
NIKEDUNKLOWSquall` chin up lil buddy.
Squall`I mean, it IS a variable, it's just constant in this expression :(
jamisnemoKasadkad: Thank you so much! That does work! Thankyouthankyouthankyou!
KasadkadSure

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