Given the sequence $-\\frac{1}{3}, \\frac{1}{2}, ...$, find the product of $a$ and $r$.
University of Ilorin MTH101 2025A past question
- $-\\frac{1}{6}$
- $\\frac{1}{6}$
- $-\\frac{2}{3}$
- $\\frac{2}{3}$
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