asked 146k views
3 votes
PLEASE HELP!!!

How is
\sqrt[7]{x^5} *\sqrt[7]{x^5} equal too
x\sqrt[7]{x^3} ? Please write the steps and properties of how you obtain
x\sqrt[7]{x^3} as a result of the equation.

1 Answer

6 votes

First combine the roots:


\sqrt[7]{x^5}\cdot\sqrt[7]{x^5}=\sqrt[7]{x^5\cdot x^5}=\sqrt[7]{x^(10)}

Now use the fact that
\sqrt[n]{x^n}=x (for odd
n):


\sqrt[7]{x^(10)}=\sqrt[7]{x^7\cdot x^3}=\sqrt[7]{x^7}\cdot\sqrt[7]{x^3}=x\sqrt[7]{x^3}

answered
User Hpar
by
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