2006-07-26 12:51:15 · 7 answers · asked by Bob 3 in Education & Reference ➔ Homework Help
Try to make b the same base as a,
as in,
2^x = 4
make 4= 2^2
so that x=2.
Use a calculator to change the base of any number to one that you desire, and it will tell you what power will yield 'B' in the equation...
2006-07-26 12:56:09 · answer #1 · answered by Yentl 4 · 3⤊ 0⤋
Logs.
http://en.wikipedia.org/wiki/Logarithm
2006-07-26 19:56:19 · answer #2 · answered by shmux 6 · 0⤊ 0⤋
It's a logarithm.
Log a (b) = x
2006-07-26 19:55:08 · answer #3 · answered by The Way Out 2 · 0⤊ 0⤋
You could use log. like xloga=logb and do it on ur calculator. hope that helps :)
2006-07-26 19:55:36 · answer #4 · answered by alexandra1288 1 · 0⤊ 0⤋
you need to take the log of both sides to move the x from the exponent...so it would be x log(a)=log(b)
2006-07-26 19:57:02 · answer #5 · answered by Teresa 2 · 0⤊ 0⤋
Use logrithms as follows:
Ln( a^x) = x*Ln(a)
so Ln( a^x) = Ln(b)
x Ln(a) = Ln(b)
so x = Ln(b)/Ln(a)
2006-07-26 19:56:34 · answer #6 · answered by rscanner 6 · 0⤊ 0⤋
Pretty sure that its
a^x=b
------------
a^ ----- a^
=
x =b
-------
---- a^
2006-07-26 20:00:10 · answer #7 · answered by royal T 1 · 0⤊ 0⤋