Question
In Exercises $1-28,$ write each expression with positive exponents only. Then simplify, if possible.$$2^{-1}+3^{-1}$$
Step 1
The rule is that $a^{-n} = \frac{1}{a^n}$, so we can rewrite $2^{-1}$ as $\frac{1}{2^{1}}$ and $3^{-1}$ as $\frac{1}{3^{1}}$. So, the expression becomes: $$2^{-1}+3^{-1} = \frac{1}{2^{1}}+\frac{1}{3^{1}}$$ Show more…
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