Math Is Fun Forum

David

Member

From: Bumpkinland

Registered: 2014-04-23

Posts: 3,164

Help - Exponential Growth and Decay

Hello, I need help with this formula

So can someone explain this formula and show me examples?

**Sorry that I edited this alot, it's my first time using latex.

Last edited by David (2014-05-29 02:52:01)

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His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,643

Re: Help - Exponential Growth and Decay

hi chooipian

One example would be for calculating compound interest.  Say you invested xo at a rate of r% per year. After one year you'd have xo (1 + r).  After two years you'd have xo(1+r)(1+r) etc.

Plus anything that increases in a similar way.

Bob

ps.  Latex looks great .

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

David

Member

From: Bumpkinland

Registered: 2014-04-23

Posts: 3,164

Re: Help - Exponential Growth and Decay

How about decay?

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His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,643

Re: Help - Exponential Growth and Decay

Yes.  Make r negative.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob