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Simplify. Assume all variables are positive. $\newline$ $\frac{u^{\frac{3}{2}}}{u^{\frac{5}{2}}}$ $\newline$ Write your answer in the form $A$ or $\frac{A}{B}$ , where $A$ and $B$ are constants or variable expressions that have no variables in common. All exponents in your answer should be positive. $\newline$ ______

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Simplify expressions involving rational exponents

Full solution

Q. Simplify. Assume all variables are positive.

\newline

\frac{u^{\frac{3}{2}}}{u^{\frac{5}{2}}}

\newline

Write your answer in the form

A

or

\frac{A}{B}

, where

A

and

B

are constants or variable expressions that have no variables in common. All exponents in your answer should be positive.

\newline

______

Identify Expression: We have the expression: $\newline$ $\frac{u^{\frac{3}{2}}}{u^{\frac{5}{2}}}$ $\newline$ Which operation will be applied with exponent? $\newline$ When dividing powers with the same base, the exponents are subtracted.
Apply Exponent Rule: Apply the exponent rule for division: $\newline$ $u^{\frac{3}{2}} / u^{\frac{5}{2}}$ $\newline$ = $u^{\frac{3}{2} - \frac{5}{2}}$ $\newline$ = $u^{-\frac{2}{2}}$ $\newline$ Subtract the exponents.
Simplify Exponent: Simplify the exponent: $u^{(-2/2)} = u^{(-1)} = \frac{1}{u}$ Since we want the exponent to be positive, we write the expression with a positive exponent.

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