AHSME 1952 Problem 26

If $\left(r+\frac1r\right)^2=3$ , then $r^3+\frac1{r^3}$ equals $\textbf{(A)}\ 1 \textbf{(B)}\ 2 \textbf{(C)}\ 0 \textbf{(D)}\ 3 \textbf{(E)}\ 6$

Dataset text NuminaMath-1.5. Quoted with source.

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