Verified Answer :

HomertheGenius

The formula for finding the sum in the geometric series:\(S_{n}=a_{1} * \frac{ r^{n} -1}{r-1}\) For finding a1:\(a_{1} = \frac{ S_{3}*(3.2-1) }{ 3.2^{3}-1 } = \frac{48455*2.2}{32.768-1}= \frac{106601}{31.768}=3355.6094\)

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