Math Problem

12y

what is i? imaginary number? interest rate?

"Every man should lose a battle in his youth, so he does not lose a war when he is old"

TonyPerkis

12y

i is the yield % pa divided by 200

so yea...call it the interest rate

I eat success for breakfast...with skim milk

MEvolutionToday

12y

DeanPortman:
Trying to do this for future valuation, can anyone help?
I need to get 'i' on its own

P= (C(1-v^20)/i) + 100v^20)

v = 1/(1+i)

stay up homies

Didn't you miss a parenthesis in the first equation?

12y

The only way I see it being done by hand is:

using binomial approximation, so (1+i)^20 = (1+20i), if i is close to 0 (which it should be, if you consider yield % / 200)

But then again this is only an approximation, and I am not sure thats what you want.

edit: I can plug it into my laptop to get an exact result a bit later, if this still remains unsolved.

"Every man should lose a battle in his youth, so he does not lose a war when he is old"

professionalmonkey

12y

ok so your parentheses dont match in the first term but anyway...

i = C(1-v^20)/(P-100v^20)

i = (1/v) - 1

was that all you wanted? that was like 5th grade algebra

Authored by: Certified Private Equity Professional - 1st Year AnalystCertified Private Equity Pro

12y

professionalmonkey:
ok so your parentheses dont match in the first term but anyway...
i = C(1-v^20)/(P-100v^20)

i = (1/v) - 1

was that all you wanted? that was like 5th grade algebra

I think he wants i in terms of C and P

edit: i.e if you substitute v in your 1st equation you still get i on the right hand side.

"Every man should lose a battle in his youth, so he does not lose a war when he is old"

TonyPerkis

12y

thats the problem...V is a function of i and I cant figure out how to get i alone, if its even possible

idc if its dumb or whatever or 5th grade algebra..im swampe

I eat success for breakfast...with skim milk

professionalmonkey

12y

DeanPortman:
thats the problem...V is a function of i and I cant figure out how to get i alone, if its even possible
idc if its dumb or whatever or 5th grade algebra..im swampe

my bad i didn't realize what you were asking...

i dont have time right now but will come back to this later if nobody solved yet

Authored by: Certified Private Equity Professional - 1st Year AnalystCertified Private Equity Pro

TonyPerkis

12y

professionalmonkey:
DeanPortman:
thats the problem...V is a function of i and I cant figure out how to get i alone, if its even possible
idc if its dumb or whatever or 5th grade algebra..im swampe

my bad i didn't realize what you were asking...

i dont have time right now but will come back to this later if nobody solved yet

no worries, shouldve clarified

I eat success for breakfast...with skim milk

12y

If a cowboy rides into town on friday stays three days leaves on friday how did he do it?

When someone finds this answer PLEASE let me know....im swamped :/

Eventus stultorum magister.

12y

If a cowboy rides into town on friday stays three days leaves on friday how did he do it?

When someone finds this answer PLEASE let me know....im swamped :/

Eventus stultorum magister.

TonyPerkis

12y

Johnny Ringo:
If a cowboy rides into town on friday stays three days leaves on friday how did he do it?
When someone finds this answer PLEASE let me know....im swamped :/

ahh that was your funniest joke yet.....twat

I eat success for breakfast...with skim milk

Anomanderis

12y

DeanPortman:
Johnny Ringo:
If a cowboy rides into town on friday stays three days leaves on friday how did he do it?
When someone finds this answer PLEASE let me know....im swamped :/

ahh that was your funniest joke yet.....twat

Twat? You're a brit?

But Rhaegar fought valiantly, Rhaegar fought nobly, Rhaegar fought bravely. And Rhaegar died.

rufiolove

12y

Johnny Ringo:
If a cowboy rides into town on friday stays three days leaves on friday how did he do it?
When someone finds this answer PLEASE let me know....im swamped :/

Friday is the name of his horse... stop being a dick

The Sunlight Hurts My Eyes Champagne Dreams 0.5 BB

12y

rufiolove:
Johnny Ringo:
If a cowboy rides into town on friday stays three days leaves on friday how did he do it?
When someone finds this answer PLEASE let me know....im swamped :/

Friday is the name of his horse... stop being a dick

THATS THE ANSWER~! THAT WAS THE QUESTION GOLDMAN SACHS (EVER HEAR OF IT) ASKED ME ON MY INTERVIEW!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Eventus stultorum magister.

melvvvar

12y

excel solver or matlab

US Debt Ceiling History

12y

DeanPortman:
Trying to do this for future valuation, can anyone help?
I need to get 'i' on its own

P= (C(1-v^20)/i) + (100v^20)

WHERE

v = 1/(1+i)

stay up homies

Maybe you could explain the specific problem you are having trouble with, there might be a way to do it without expressing i.

Or is that all you want?

"Every man should lose a battle in his youth, so he does not lose a war when he is old"

TonyPerkis

12y

I on its own is all I need lol. It's just aussie bond future valuation

I eat success for breakfast...with skim milk

12y

DeanPortman:
I on its own is all I need lol. It's just aussie bond future valuation

I don't think it is possible, as any way you look at it you have to solve 20th order polynomial equation, which is impossible.

So the only 2 ways are:

1) By hand, not accurate - binomial approximation that I outlined above.

2) Accurate solution - use any numerical package and plug in your values for c and price. WolframAlpha if you don't have Matlab/etc

"Every man should lose a battle in his youth, so he does not lose a war when he is old"

protectedclass

12y

Not solvable. This is a subset of math called Group Theory.

Anything over(I think) 6th degree is impossible to solve analytically.

melvvvar

12y

protectedclass:
Not solvable. This is a subset of math called Group Theory.
Anything over(I think) 6th degree is impossible to solve analytically.

5th degree polynomial

and the day they start using galois theory in banking is the day i get back on my spaceship and return to my home planet

Financial Modeling Guide

12y

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"Every man should lose a battle in his youth, so he does not lose a war when he is old"

12y

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