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
azamat
3 years ago
9

Given the following geometric sequence, find the 12th term: {2, -4, 8, ...}.

Mathematics
1 answer:
BaLLatris [955]3 years ago
3 0
2 times what = -4?
-2 does
-2 x 2 = -4

-4 time what = 8?
Again, -2.
-2 x -4 = 8

You could do this over and over again or make a table, or you can make a function.
f(n) = f(1) • r^{n-1}
f(1) in this case is 2.
f(n) = 2 • r^{n-1}
r is rate of change, which is -2.
f(n) = 2 • -2^{n-1}
To find the 12th number in the sequence, just substitute n for 12.
f(12) = 2 • -2^{12-1}
f(12) = 2 • -2^{11}
-2^11 = -2048
2 x -2048 = -4096
So the 12th number in the sequence will be -4096.
You might be interested in
Please help brain fam!!!
Alex787 [66]
The last statement. they are supplementary angles because they make 180 degrees. and they aren't corresponding, they're adjacent, meaning side by side sharing an arm. and they form a straight line
5 0
3 years ago
Read 2 more answers
Healthcare workers often use medicine or surgery to diagnose diseases. study diseases. prevent diseases. treat diseases.
mariarad [96]
Healthcare workers use it often to Treat diseases
8 0
2 years ago
Read 2 more answers
Tyler earned $74 at his job when he worked for 6 hours. What was his hourly pay rate in hours per dollar. HOURS PER DOLLAR NOT D
Andrej [43]

Answer:12.33

Step-by-step explanation:

4 0
3 years ago
1. Which of the following measurements could be the three side lengths of a right triangle? a. 4 cm, 5 cm, 9 cm b. 12 cm, 20 cm,
HACTEHA [7]

Answer:

b and c

Step-by-step explanation:

The Triangle Inequality Theorem lets us know that the sum of the two shortest sides of the triangle must be greater than the third side of the triangle.

In both A and D, the sum of the shortest two sides are equal to, not greater than the third side, so they will not form a triangle.

In B, 12+20 is 32, which is greater than 25. And in C, 18+24 is 42, which is greater than 30, so they both will form a triangle.

8 0
3 years ago
1. *
julsineya [31]

Answer:

Her multiplication

Step-by-step explanation:

Not really an aexplanation

8 0
3 years ago
Other questions:
  • The design for the palladium window shown includes a semicircular shape at the top. The bottom is formed by squares of equal siz
    13·2 answers
  • What would 19 and 4/5 be as a decimal like this:
    13·1 answer
  • Number 1,3,5,6 please
    8·2 answers
  • 4. The student council sold flowers for the Sweetheart dance as a fundraising
    13·1 answer
  • 1. Find the number of real number solutions for the equation.
    10·1 answer
  • What is the y-coordinate of point D after a translation of (x, y) → (x + 6, y – 4)?
    5·1 answer
  • 3x:10 = 5:2 calculate the value of x
    12·1 answer
  • GIVING BRAINLIEST PLEASE HELP
    6·2 answers
  • Can someone figure this out for me?
    11·1 answer
  • -2/11 ÷ -3 /11 remember to simplify
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!