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11-06-2020
Mathematics

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The first term of a geometric sequence is -2 and the multiplier, or ratio is -3. What is the sum of the first 5 terms of the sequence

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14-06-2020

Answer:

-122

Solution:

-2×-3^(n-1)

First five terms:

-2, 6, -18, 54, -162

Add the 5 terms.

-2+6-18+54-162

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