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OpenStudy (anonymous):
the fourth term of a geometric sequence is 48 and the seventh term of the sequence is 384. determine the first term of the sequence.
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OpenStudy (anonymous):
This is the formula for the nth term in a Geometric sequence: \[a_n=a_1r^{n-1}\] So for the forth term we have \(a_4=a_1r^3=48\) and for the seventh term we have \(a_7=a_1r^6=384\) Can you find \(a_1\)?
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