Question

$81$ in exponential form as
a) base $9$
b) base $3$

Answer 1

$81\Rightarrow 9\times 9\Rightarrow 3\times 3\times 3\times 3$

$\left(i\right)81=9\times 9=9^2$

$\left(ii\right)81=3\times 3\times 3\times 3=3^4$