A geometric sequence has first term 2 and common ratio 3. Find the sum of the first 7 terms.
Answer and explanation
Correct answer: C. 2186
- Step 1: .
- Step 2: .
Answer
2186.
Why not the others: 4374: that is the th term. 4372: it forgets to divide by . 1458: that is the last term.
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