help me with this algebra please.

[benhogan]

i'm stumped. help me find X

A=B(1+X)^n

I've been trying to figure it out for the past hour. It is basically the time value of money equation. the unknown is the rate (X)
A=new value
B=old value
n=# of periods

[jplinville]

Dear Algebra,

I don't know where your X is, nor do I care Y they haven't come back.

Yours truly,

Me

[benhogan]

Originally Posted by jplinville

Dear Algebra,

I don't know where your X is, nor do I care Y they haven't come back.

Yours truly,

Me

man, that is profound!

[jplinville]

Originally Posted by benhogan

man, that is profound!

LOL

This would be a problem I'd have my daughter look at later tonight to see if it makes sense to her. She's in advanced Algebra II at her high school.

I'll let you know what she comes up with...

[TheDon]

can you do

take the nth root of (a/b) -1 = x

??

its been a while for me too.

[benhogan]

Originally Posted by TheDon

can you do

take the nth root of (a/b) -1 = x

??

its been a while for me too.

no. i tried that. i suspect that both sides have to be raised to the "e". just not sure.

[cmac2012]

Originally Posted by TheDon

can you do

take the nth root of (a/b) -1 = x

??

its been a while for me too.

That's what I got also.

[benhogan]

Originally Posted by cmac2012

That's what I got also.

that's gotta be it. i just could not use the calculator properly. thanks guys. you rock

[benhogan]

Originally Posted by benhogan

that's gotta be it. i just could not use the calculator properly. thanks guys. you rock

nope. it will take an algebra genius to get this right.

if A=121, B=100, n=2 then X=10%

i can use a HP 12c financial calculator but I can't figure out the algebra part

[Eskimo]

Originally Posted by benhogan

nope. it will take an algebra genius to get this right.

if A=121, B=100, n=2 then X=10%

i can use a HP 12c financial calculator but I can't figure out the algebra part

If you plug those numbers into the equation TheDon offered, doesn't it work for you? It does for me.

[Dudesky]

Originally Posted by benhogan

nope. it will take an algebra genius to get this right.

if A=121, B=100, n=2 then X=10%

i can use a HP 12c financial calculator but I can't figure out the algebra part

Most TI calculators you can enter direct and it scrambles the eggs for you and pops out the answer.

[dynalow]

Originally Posted by benhogan

nope. it will take an algebra genius to get this right.

if A=121, B=100, n=2 then X=10%

i can use a HP 12c financial calculator but I can't figure out the algebra part

fyi, there is now an iphone app for the HP12c. It's about 3 bucks my partner told me. He uses it all the time
(I still use the 19B "booklet" It works!)

[TheDon]

Originally Posted by benhogan

that's gotta be it. i just could not use the calculator properly. thanks guys. you rock

Originally Posted by jplinville

Does anyone sit down with pen and paper anymore? I used to use trig on a daily basis, and rarely used a calculator. My kids are issued calculators in school. Heck, most of the most common sines used, I memorized years ago.

I guess it is one of those things that you lose if it isn't used.

I used a pen and paper, lol. Apparently I Was wrong but I'd like to see the math behind it as well to see where I messed up

I hated algebra but I need to take Calc 1 just for fun so I have it on my transcripts

[KarTek]

If you have Excel on your computer, you can simply type any formula you want into the cells and then plug values in and it will do the calculations for you.

[jplinville]

Does anyone sit down with pen and paper anymore? I used to use trig on a daily basis, and rarely used a calculator. My kids are issued calculators in school. Heck, most of the most common sines used, I memorized years ago.

I guess it is one of those things that you lose if it isn't used.