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SVETLANKA909090 [29]
3 years ago
15

Use the formula to evaluate the series 3-9+27-81+...-a8

Mathematics
1 answer:
Andrej [43]3 years ago
6 0

In the given series, we see that the first term is 3 and the common ratio between the succeeding terms is -3. To solve for the sum of the first 8 terms, we use the equation,

                                    Sum = (a1)(1 – r^n) / (1 – r)

Substituting the known terms,

                                    Sum = (3)(1 – (-3)^8)/(1 - -3) = -4920

<span>Thus, the answer is -4920.</span>

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Graph the line that represents a proportional relationship between yyy and xxx where the unit rate of change of yyy with respect
Rina8888 [55]

The equation of the line of the graph would be, y = 5/3x.

The graph of the line is shown in the diagram attached below.

<h3>What is a Proportional Relationship Graph?</h3>

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Given that the line that represents a proportional relationship between x and y is where the unit rate of change is given as 5/3, the equation of the line of the graph would be, y = 5/3x.

The graph of the line is shown in the diagram attached below.

Learn more about proportional relationship graph on:

brainly.com/question/21302696

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