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djverab [1.8K]
2 years ago
7

Write the sum using summation notation, assuming the suggested pattern continues. 1 - 3 + 9 - 27 + ...

Mathematics
2 answers:
larisa [96]2 years ago
6 0
Σ-3^(n-1)  for n=[1,n]

Angie above is correct though as there is no sum for this as an infinite series as r^2>1.

The only time infinite series have a sum is if r^2<1, and that sum is just s=a/(1-r)


meriva2 years ago
4 0
There is no sum for this geometric series. it diverges rather than converges due to the absolute value of the common ratio (r), which is -3, being 3. for a geometric series to have a sum (to converge), the absolute value of r must be less than 1. 
(you find r by dividing a2/a1, a3/a2, etc.)
hope this helps
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a company bought 12 boxed lunches from a delli for $74.50 each boxed lunch costs the same amount which equation represents the p
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I they each cost 6.21$ caz if u do 6.21 you get 74.53 but if you do 6.20 you get74.40 what ever u prefer
4 0
3 years ago
Jason considered two similar televisions at a local electronics store. The generic version was based off the brand name and was
slavikrds [6]

Keywords:

<em>Variables, televisions, generic version, TV brand, dimensions </em>

For this case we have two televisions, one generic version and one brand. We know that the generic version represents \frac {2} {3}the size of the brand. We must define two variables that represent the dimensions of the brand TV, so we have:

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  • y: Brand TV width

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By clearing the variables we have:

x = 12 \frac {3} {2} = 18\\y = 24 \frac {3} {2} = 36

Thus, the dimensions of the brand TV are 18 inches by 36 inches

Answer:

 The dimensions of the brand TV are 18 inches by 36 inches

3 0
2 years ago
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Refer to the edited figure.

Triangles ABC and A'B'C' are similar because of AAA.
Also,
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Therefore
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Answer:   reduction; one-third.
The dilation is a reduction.
The scale factor of the dilation is one-third.

8 0
3 years ago
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