We are given the following radical expression:
[tex]\sqrt[]{a+b}[/tex]
We are asked to determine the equivalent exponential expression. To do that we will use the following relationship:
[tex]\sqrt[]{x}=x^{\frac{1}{2}}[/tex]
Applying the relationship we get:
[tex]\sqrt[]{a+b}=(a+b)^{\frac{1}{2}}[/tex]
Therefore, the right answer would be B.
