Question

Find the value of 49^-1/2

Answer 1

`(1)/(7)`

Explanation:

using the properties of exponents / radicals

•
`a^(-m)` =
`(1)/(a^(m) )`

•
`a^{(1)/(2) }` =
`√(a)`

given

`49^{-(1)/(2) }`

=
`\frac{1}{49^{(1)/(2) } }`

=
`(1)/(√(49) )`

=
`(1)/(7)`