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the sum The first six terms of a geometric series is 15,624 and the common ratio is 5 what is the first term of the series

User Sherice
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1 Answer

6 votes

Answer:

4

Explanation:

The sum of the first n terms of a geometric series is:

S = a₁ (1 − r^n) / (1 − r)

Given n = 6, S = 15624, and r = 5:

15624 = a₁ (1 − 5^6) / (1 − 5)

a₁ = 4

User Berdario
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