Question

what does log mean? And how would you solve this? y = log x
If y = 10, then what is x?

Answer 1

y=log(x) we assume base 10 if there is no "base" included

10 = log(x)

10^x = 10

x = 1

Answer 2

or do I have that backwards....

Answer 3

x = 10,000,000,000 maybe..

10 = log(x)

10^10 = 10^log(x)

10^10 = x

yep... had it backwards

Answer 4

Thanks
Actually i think you were right the first time because i though it out
y = log x
10 = log x
10 = 10^x
x = 1

Answer 5

no, I had it wrong first time, so I worked it out with the rules...

your third step there, you need to base10 both sides...

10^10 = 10^log(x) the right hand side become x now

10^10 = x

x = 10,000,000,000

Answer 6

another way to look at is is logs ARE exponents, 10 is the exponent of your base 10. 10^10 = x....

Answer 7

http://library.thinkquest.org/J002235/hard.html and could you give me any webites on the work involved in log?

Answer 8

log2(x) = 3

2^3 = x

x = 8

or....

log2(x) = 3

2^log2(x) = 2^3

x = 2^3

x = 8

Answer 9

websites? nah.... I just work them out of the library textbooks if anything

Answer 10

thanks a lot your help is gadly appreciated