1. anonymous

2. anonymous

@ranga ?

3. anonymous

@ash2326 ?

4. anonymous

first multiply $$3\times 7=21$$ to write it as $\large\sqrt[5]{x^{21}}$

5. anonymous

then rewrite with a rational exponent, by the rule that $\large \sqrt[n]{x^m}=x^{\frac{m}{n}}$ to get $\large \sqrt[5]{x^{21}}=x^{\frac{21}{5}}$

6. anonymous

Wow , and that's it ? I guess I have over-thinking the question ! Thank you :))

7. anonymous

I have 4 more questions that I can't seem to understand , can you help ?