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What is the sum of the first 6 terms of this geometric sequence? 1, 8, 64, 512, …
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What is the sum of the first 6 terms of this geometric sequence? 1, 8, 64, 512, …

User Ngima Sherpa
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Use the formula. Sn=a1(1−r^n) / 1−r, Where a1 is the first term (1 in this case), r is 8, and n is the number of terms. So 1(1-8^6) / 1-8
User Anton Kastritskiy
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