Answer
$\sqrt[10] b$
Work Step by Step
$\dfrac{\sqrt[5] {b^{2}}}{\sqrt[10] {b^{3}}}=\dfrac{b^{2/5}}{b^{3/10}}=b^{2/5-3/10}=b^{1/10}=\sqrt[10] b$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.