Question

81^3/4

Answer 1

simplify...

Answer 2

\[81^{3/4}=81\times81^{-1/4}\]\[=81\times\frac{1}{\sqrt[4]{81}}\]\[=81\times\frac{1}{\sqrt[4]{3^4}}\]\[=81\times\frac 13\]\[=\cdots\]

Answer 3

or simply \[81^{3/4}=({3^4})^{3/4}=3^3=\cdots\]

Answer 4

wait thats not right... 3^2 is 9... which is the square root of 81.. which is not right...

Answer 5

Always remember that for these, if you can find the root first, do it first.