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Lyrx [107]
2 years ago
14

The sum of the first 15 terms of a geometric sequence with 7 as the first term and a common ratio of -3 is __________.

Mathematics
1 answer:
Andre45 [30]2 years ago
4 0

Step-by-step explanation:

the formula for the sum of the first n terms of a geometric sequence is

Sn = s1(1 - r^n)/(1 - r)

with r being the common ratio and s1 is the first term.

so,

S15 = 7×(1 - (-3)¹⁵)/(1 - -3) = 7×(1 - -14,348,907)/4 =

= 7×14,348,908/4 = 7×3,587,227 = 25,110,589

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Jack took out a 6-year loan for $25,000 to purchase a boat at a 4.5% interest rate. If the interest is compounded monthly, what
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Step-by-step explanation:

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Read 2 more answers
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ivolga24 [154]

Explanation

2x^2-4x+3

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also, the derivate of a sum is the sum of the derivates

hence

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Step 1

apply:

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therefore, the answer is

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1 year ago
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