Question

Hi can someone please help me? I’m confused

Answer 1

B, D and E

Explanation:

Using the rules of exponents/ radicals

`a^(-m)` =
`(1)/(a^(m) )`

`a^{(1)/(2) }` =
`√(a)`

Given

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

=
`(1)/(√(49) )` → B

=
`(1)/(7)` → D