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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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In chemistry, there is a class of compounds called alkanes. They have the general formula 2x+2, where stands for a carbon
mixer [17]

Answer:Alkanes: CnH2n+2

n=8 --> C8H18. So it is 18 atoms

Step-by-step explanation:

8 0
3 years ago
In circle O below, what is the measure of arc ED?
Serga [27]
Triangle FOD is an isosceles with base FD.
FD = 2 · 4 = 8
FD = CB
Arc CB = 56°
Arc ED = 1/2 Arc FD = 1/2 Arc CB
Arc ED = 56° : 2
Answer:
Arc ED = 28° 

5 0
3 years ago
For the 50 students in an art contest, there will be 1 prize for first-place, 1 prize for second-place, and 3 prizes for honorab
Sonja [21]

Step-by-step explanation:

there are 50 students and 5 prizes (1 + 1 + 3).

so, already in natural language we would say "there is 1 prize for every 10 students".

formally, remember the rule of probability : desired outcomes over total possible outcomes.

this is here

5/50 = 1/10 = 0.1

your can see it also this way :

if there was only 1 prize, each student would have a chance of 1/50 of winning.

now there are 5 prizes, which gives everybody 5 times the chance of winning. which is then 5×1/50 = 5/50 = 0.1

6 0
2 years ago
HELP IF U CAN! ASAP PLEASE!
lesya692 [45]

Answer:

Just do your best

Step-by-step explanation:

6 0
3 years ago
An ant can travel at a constant speed of 980 inches in every 5 minutes how far does the ant travel in 7 minutes
IrinaK [193]

Answer:

1372

Step-by-step explanation:

Because 980 divided by 5 is 196 and 196 x 5 = 980

So you take 196 and multiply it by 5 and it's 1372

Hope this helps :)

4 0
3 years ago
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