# Math Help - log

1. Originally Posted by franckherve1
but the base is not 25 ...there's nothing so i guess the base should be 10
Yes, the log a means that the base is 10.
May be: 1/log25=1/1.397 =0.7

25^(1/log(25))=x
log[25^(1/log(25))]=log[x]
log(25)*1/log(25)=log[x]
1=log[x]
base (10 e or whatever) = x

3. Originally Posted by franckherve1
1/log 25
25 what's its value?
Please, can you give the question more clearly?
Do you want to know the value of 1/log25?

4. let x be the value of 25^(1/log25)
so
25^(1/log25) = x
log(25)x = 1/log25, where (25) is the base (log of x to the base 25 is 1/log25)

then,
$logx/log25 = 1/log25$
$logx = 1$
so, x = 10
$25^[1/log(25)] = 10$

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