Question

How to solve: (1/9)^x=729

Answer 1

ln(1/9)^x = ln 729
xln(1/9)=ln 729

does that help

Answer 2

Yes let me try it

Answer 3

Are you allowed to use a calculator on this Chris?

If not, it's a little tricky. You need to notice that both numbers are divisible by 3.
So we can rewrite the left AND right side using some clever algebra.

Answer 4

yes i am allowed a calculator

Answer 5

Oh ok cool :)

Answer 6

got it its -3 correct?

Answer 7

x=-3

Answer 8

Yes looks good!