mayamabjishovrvq9
28.02.2020 •
Mathematics
Evaluate the geometric series 1 + 6+ ... + 7776.
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Ответ:
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
Ответ:
224
Step-by-step explanation: