1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Murljashka [212]
3 years ago
12

What is the sum of the first 7 terms of the series −4+8−16+32−... ?

Mathematics
1 answer:
pochemuha3 years ago
4 0

we have that

−4+8−16+32−.....

a1=-2*(-2)-----> -4

a2=-4*(-2)-----> +8

a3=+8*(-2)-----> -16

a4=-16*(-2)----> +32

a5=+32*(-2)----> -64

a6=-64*(-2)-----> +128

a7=+128*(-2)-----> -256

The sum of the first 7 terms of the series is

<span>[a1+a2+a3+a4+a5+a6+a7]-----> [-4+8-16+32-64+128-256]-------> -172</span>

<span>
the answer is -172</span>
You might be interested in
In a class of 6, there are 2 students who forgot their lunch.
lukranit [14]

Answer:

1/8

Step-by-step explanation:

AB,AA,BB,BB,BB,BB,BB,BB,

*A IS THE students that forgot thier lunch

4 0
3 years ago
What is the value of 9p5?
ICE Princess25 [194]
9.5 is correct (:(:(:
6 0
3 years ago
3 consecutive even integers whose sum is 54
Andre45 [30]
N+n+2+n+4=54

3n+6=54

3n=48

n=16

16, 18, 20
4 0
3 years ago
Read 2 more answers
What is 82,119 rounded to the nearest ten thousand?
Stels [109]
80,000.
To round up to the nearest ten thousand, we would see if the next lower place value has a amount either 5 or higher or 4 or lower.
If it’s five or higher, we round up.
If it’s four or lower, we round down.
We can see that the number in the ten thousands place is 8. The number in the place value after 8 is 2.
2<5 so we round down.
The answer is 80,000.
Hope this helps!
8 0
3 years ago
Solve the given proportion for x.  Answer to two decimal places. x/5=16/21​
Angelina_Jolie [31]

\\ \sf\longmapsto \dfrac{x}{5}=\dfrac{16}{21}

\\ \sf\longmapsto 21x=16(5)

\\ \sf\longmapsto 21x=80

\\ \sf\longmapsto x=\dfrac{80}{21}

\\ \sf\longmapsto x=3.6

3 0
2 years ago
Read 2 more answers
Other questions:
  • A triangle can have one right angle.<br> a. True<br> b. False
    8·1 answer
  • The local music activities coordinator sold 300 tickets to the orchestra concert. Student tickets were $4, and adult tickets wer
    11·1 answer
  • the initial vertical velocity of a rocket shot straight up is 42 meters per second. How long does it take for the rocket to retu
    8·1 answer
  • How many liters of a 90% acid solution must be added to 6 liters of a 15% acid solution to obtain a 40% acid solution?
    15·1 answer
  • How many solutions does the equation 9x+27=27 have ?
    9·1 answer
  • The probability that even A occurs is 5/7 and the probability that even B occurs is 2/3 are independent event's what is the prob
    8·1 answer
  • An urn contains six red balls numbered 1, 2, 3, 4, 5, 6, two white balls numbered 7, 8, and two black balls numbered 9, 10. A ba
    14·1 answer
  • Fill in the missing number:<br> 497 +<br> = 1,404
    15·2 answers
  • What is meaning of trigonometry ​
    14·2 answers
  • Find the explicit form of the arithmetic function of n if the first term is 3 and the common difference is -4 . Then find the se
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!