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kari74 [83]
3 years ago
8

What is the sum of the geometric series? Sigma-Summation Underscript n = 1 Overscript 4 EndScripts (negative 2) (negative 3) Sup

erscript n minus 1
Mathematics
2 answers:
belka [17]3 years ago
8 0

Answer:

Step-by-step explanation:

∑⁴ₙ₌₁ -144 (½)ⁿ⁻¹

This is a finite geometric series with n = 4, a₁ = -144, and r = ½.

S = a₁ (1 − rⁿ) / (1 − r)

S = -144 (1 − (½)⁴) / (1 − ½)

S = -270

If you wanted to find the infinite sum (n = ∞):

S = a₁ / (1 − r)

S = -144 / (1 − ½)

S = -288

Read more on Brainly.com - brainly.com/question/14504382#readmore

Alex777 [14]3 years ago
5 0

Answer:

The answer is C (40)

Step-by-step explanation:

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The area of a circle with radius 1 cm is ______________. (Use 3.14 for pi)
Tcecarenko [31]

Answer:

6,28

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7 0
3 years ago
joe and Eric have to ship 75 packages. Joe can do the job alone in 5 hours. if Eric helps, they get it done in 4 hours. How long
Umnica [9.8K]

Eric took 20 hours to do the job alone.

<u>Step-by-step explanation</u>:

<u>Given </u>:

  • Total work = 75 packages
  • Joe took 5 hours to complete the total work.

The amount of work Joe alone can do per hour = 75/5 = 15 packages.

The amount of work Joe and Eric together do per hour = 75/4 = 18.75

The amount of work Eric alone can do per hour = 18.75 - 15 = 3.75

The time Eric took to complete the entire work = 75 / 3.75 = 20 hours.

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3 years ago
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lara [203]

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Step-by-step explanation:

31/4=7-3

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3 years ago
A group of friends is sharing 2 1/2 pounds of berries. If each friend received 5/4 of a pound of berries, how many friends are s
pychu [463]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
If y varies directly with x and y = 10 when k = 10, what is the value of x?
Damm [24]

<span><span>y = k *x
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10 = 10*x
x = 10/10 = 1</span></span>

x =1


7 0
3 years ago
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