## Algebra: A Combined Approach (4th Edition)

$\sqrt[7]{(2x+1)^2}$
Keep in mind that the index is the denominator of the exponent. Some examples such as this will be easier to simplify into the form, $\sqrt[n] {a^m}$ $(2x+1)^{2/7}$ $\sqrt[7]{(2x+1)^2}$