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2016 AMC 12B Question 1

AMC12 · 2016 AMC 12B

Question 1

What is the value of

$$
\frac{2a^{-1}+\frac{a^{-1}}{2}}{a}
$$

when $a=\tfrac12?$
  1. $1$
  2. $2$
  3. $\dfrac52$
  4. $10$
  5. $20$