Question

logx9 = -2 . what's the value of x?

Answer 1

the log argument is 9x or x^9??

Answer 2

And what's the base of the logarithm?

Answer 3

the base is x

Answer 4

Ohhhh. Much easier, then. So, x^(-2) = 9 which means that x = 9^(1/2) or -9^(1/2) = 1/3 or -1/3.

Answer 5

Right!

Answer 6

no no no

Answer 7

Should the negative term not be in there? I wasn't completely positive. :P

Answer 8

(Pun.)

Answer 9

not there...

the correct way write is
9=x^-2

9=1/x^2

x^2=1/9
x=+1/3 or x=-1/3

Answer 10

Yes, I just skipped a step. Sorry :P