# Is there a formula for #root(x)(a) xx root(y)(a)#? For example, #sqrt(81) xx root4(81)#

##### 2 Answers

#### Answer:

#### Explanation:

There is no formula i.e. often used by people to solve such problems. However, mathematics is full of surprises and it does not mean that we cannot have a formula.

Here it is observed that in the example you have square root and fourth roots of

=

=

=

=

=

i.e.

If

Using this

=

=

=