Question

solve: 1/81=b^-4
Can you please show me the steps to take?
Thanks

Answer 1

you could start with
\[81=b^4\] then
\[b=\sqrt[4]{81}\]

Answer 2

I'm sorry i don't understand.

Answer 3

@satellite73

Answer 4

\[\frac{ 1 }{ 81 }=b ^{-4},\frac{ 1 }{ 3^4 }=b ^{-4},3^{-4}=b ^{-4},b=?\]