A quick math question regarding a logarithm..

[imported_K3N]

Im trying to solve how to do the following math problem

http://img252.imageshack.us/img252/2206/dssfiw2.jpg

how do i find out what a is, using my ti-83 plus calculator, thanks in advance..

 

[FleshLight]

Logb x = Loga x/Loga b

 

[hdeck]

7^3 = a

 

[imported_K3N]

aah thanks, that did the trick

 

[chuckywang]

Originally posted by: K3N
Im trying to solve how to do the following math problem

http://img252.imageshack.us/img252/2206/dssfiw2.jpg

how do i find out what a is, using my ti-83 plus calculator, thanks in advance..

Use your brain instead. Sounds harsh, but it's true.

 

[Kyteland]

Originally posted by: FleshLight
Logb x = Loga x/Loga b

While this is an important fact to know about logarithms, understanding the definition of logarithm is much more important.