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Lesson 6: Sum of Geometric Series
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Sum of Geometric Series
Lesson 6 · Sum of Geometric Series
Sum of Geometric Series
Mathematics
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8 min
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Question 1 of 12
1
Which of these is the sum of the first \( n \) terms of a geometric series with first term \( a \) and common ratio \( r > 1 \)?
\( \frac{a(r^{n-1} - 1)}{r - 1} \)
\( \frac{a(r^n - 1)}{r - 1} \)
\( \frac{a(r^n - 1)}{1 - r} \)
\( ar^{n-1} \)