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#1 2011-07-25 22:14:38

diamond777
Member
Registered: 2011-07-19
Posts: 20

Help!

seventy years young student of maths is fun
In need of lots of help!
lets start with:
algebra - working with exponents and logarithms-
question five
solve (for x)
2log3(x)=5
answer D x = 9square root(3)
i presume the 2 means that x is squared in the question?
please explain what 9square root of (3) is and how it is the square root of 243?
thank you ....

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#2 2011-07-25 22:29:13

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,410

Re: Help!

Hi diamond777;

seventy years young student of maths is fun
In need of lots of help!

Divide both sides by 2

3^x both sides.

Welcome to the forum, young man.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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#3 2011-07-25 22:40:34

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,730

Re: Help!

Hi diamond777,

Welcome to the forum!


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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