1952 AHSME Problem 12

The sum to infinity of the terms of an infinite geometric progression is 6. The sum of the first two terms is 4\frac{1}{2}. The first term of the progression is:

\textbf{(A) \ }3 \text{ or } 1\frac{1}{2} \qquad \textbf{(B) \ }1 \qquad \textbf{(C) \ }2\frac{1}{2} \qquad \textbf{(D) \ }6 \qquad \textbf{(E) \ }9\text{ or }3

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.