Question
For $A=\{2,3,5,7,8,10,13\}$, let$B=\{x \in A: x=y+z$, where $y, z \in A\}$ and $C=\{r \in B: r+s \in B$ for some $s \in B\}$.Determine $C$.
Step 1
- Check each element of \( A \) to see if it can be expressed as the sum of two (not necessarily distinct) elements from \( A \). - \( 2 \) cannot be expressed as a sum of any two elements from \( A \). - \( 3 \) cannot be expressed as a sum of any two elements Show more…
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