Question
Write the sums using sigma notation. (Note that the answers are not unique.)$$\frac{1}{2}+\frac{2}{4}+\frac{3}{8}+\frac{4}{16}+\dots+\frac{n}{2^{n}}$$
Step 1
We can see that the numerator of each term is increasing by 1, starting from 1 and going up to n. The denominator of each term is a power of 2, starting from $2^1$ and going up to $2^n$. Show more…
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