Question

solve for x x=log^3 1/81

Answer 1

Do you mean
\[x=\log_3 (81)\] ?

Answer 2

yes except it is 1/81 I couldn't get the little three

Answer 3

Okay. Well,
\[\log_3(\frac{1}{81}) = \log_3(\frac{1}{3^4})=\log_3(3^{-4})=-4\]