Question

Solve : $9^{\frac{5}{2}}-3\times 8^{\circ }-{\left(\frac{1}{81}\right)}^{-\frac{1}{2}}$

Answer 1

$9^{\frac{5}{2}}-3\times 8^o-{\left(\frac{1}{81}\right)}^{\frac{-1}{2}}$

$\Rightarrow (9^{1/2}{)}^5-3\times 1-(81{)}^{1/2}$

$\Rightarrow 3^5-3-9$

$\Rightarrow 243-12$

$\Rightarrow 231$.