Question

http://prntscr.com/av72rn help

Answer 1

You subtract exponents when dividing.
\[\frac{ 7 }{ 8 }-\frac{ 1 }{ 4 }\]
So you need to get like terms.
\[\frac{ 7 }{ 8 }-\frac{ 2 }{ 8 }\]
Then you solve.
\[\frac{ 5 }{ 8 }\]
The base number stays the same, but this is your new exponent.
\[2^{\frac{ 5 }{ 8 }}\]
The bottom number is how many roots you take.
The top number is how many times you multiply the base number by.
\[\sqrt[8]{2^{5}}\]
So the answer is A.

Answer 2

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