Question

Hi can someone please help me? I’m confused

Answer 1

Answer:

B, D and E

Step-by-step explanation:

Using the rules of exponents/ radicals

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

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

Given

$49^{-\frac{1}{2} }$ = $\frac{1}{49^{\frac{1}{2} } }$  → E

= $\frac{1}{\sqrt{49} }$  → B

= $\frac{1}{7}$ → D