Verified answer

4 = log x^(-1)

10^4 = x^-1

x = 1/10000

Assume log is log to base 2 in the following :-

- 4 = log x

x = 2^(- 4)

x = 1 / 16

multiply both side by -1 to get log[x]=-4

take apply the exponential function to both sides to get

10^(log[x]) = 10^(-4)

which simplifies to [x] = 10^(-4).

So, x = plus or minus 10^(-4)

You guys forgot about the absolute value. I'm the only one ot give the right answer and I get two thumbs down? What gives?

- log(a)= log(1/a)

4 = log|x^-1|

4 = log|1/x|

10^4=1/x

x= 10^-4

x=1/10000