Question
Simplify each expression. Write answers without negative exponents. Assume all variables represent positive real numbers. See Examples 5 and 6 .$$r^{-8 / 9} \cdot r^{17 / 9}$$
Step 1
According to the rule of exponents, when we multiply two exponents with the same base, we add their powers. So, we can rewrite the expression as $r^{-8 / 9 + 17 / 9}$. Show more…
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