Question

Find the value of
4 root (81)^-2​

Answer 1

Answer:

4/81

Step-by-step explanation:

$4 \: \sqrt[]{ {81}^{ - 2} }$

we know that,

${a}^{ - 2} = \frac{1}{ {a}^{2} }$

Therefore,

we can write as,

$=4 \: \sqrt[]{ \frac{1}{ {81}^{2} } }$

= $4 \times \frac{1}{81}$

= 4/81