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Henry
Mathematics
14 November, 08:23
Evaluate the geometric series 1 + 6 + ... + 7776.
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Thunder
14 November, 08:51
0
9331
Step-by-step explanation:
clearly, r=6
So, if there are n+1 terms, 6^n = 7776
n = 5
S6 = a (r^6-1) / (r-1) = 1 (6^6-1) / (6-1) = 46655/5
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