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
guapka [62]
3 years ago
11

1,-2,3,-4,5... what’s the next two numbers in the pattern?

Mathematics
1 answer:
MrMuchimi3 years ago
4 0

Answer:

The two numbers following 1,-2,3,-4,5...  are -6 and 7.

Step-by-step explanation:

index:   1   2   3   4   5 ....

value:    1  -2  3  -4   5

Let the index be n.  Then the first term is a(1), the secon is a(2), and so on.

a(2) = 2*(-1)^(2-1) = 2*(-1) = -2 (correct)

a(3) = 3*(-1)^(3-1)   =  3*(-1)^2 = 3 (correct)

a(4) = 4*(-1)^(4-1)    = 4*(-1)^3 = -4 (correct)

So the general formula for a(n)  is:    a(n)=n(-1)^(n-1)

Thus,

a(5) = 5(-1)^4 = 5

a(6) = 6(-1)^5 = -6

a(7) = 7(-1)^6 = 7

The "next two numbers in the pattern" are -6 and 7.  The first 7 numbers are

1,-2,3,-4,5, -6, 7

You might be interested in
Please help me I’ll mark brainliest:)
Archy [21]

Answer:

x = 4

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the percent increase between 8,863,052 and 9,149,840?
kvasek [131]

Answer:

increase = 9149840 - 8863052 \\  = 286788 \\ \% \: increase =  \frac{286788}{8863052}  \times 100\% \\  = 3.24\%

4 0
3 years ago
Read 2 more answers
If you know the measure of the vertex angle of an isosceles triangle, how do you find out the measure of the base angles?
Irina-Kira [14]

Answer:

Step-by-step explanation:

An isosceles triangle has 2 sides that are the same length.  Let's say that our triangle has the 2 sides measuring the same and the base is a different length.  The vertex angle is the top angle.  By the definition of an isosceles triangle, since the 2 sides measure the same length, then the angles across from those sides have the same degree measure.  If we know the measure of the vertex angle, then we have

180 = vertex angle - base angle - base angle

but since the base angles are the same and we have 2 of them, then

180 = vertex angle - 2 base angles

For example, if the vertex angle measures 80 degrees, then 180 - 80 = 100.  That 100 has to be split in half for each of the base angles which are the same as each other.  So the vertex angle is 80 and each base is 50.

6 0
3 years ago
You have two fair, six-sides dice. However, the dice have been modified so that instead or 1,2,3,4,5,6 the sides are numbered 1,
Tamiku [17]

Answer:

30.56%

Step-by-step explanation:

Let the sides on each dice be labeled as 1, 2a, 2b, 2c, 3, 4.

The sample space for the sum of the values being 4 is:

S={1,3; 3,1; 2a,2a; 2a,2b; 2a,2c; 2b,2a; 2b,2b; 2b,2c; 2c,2a; 2c,2b; 2c,2c}

There are 11 possible sums out of the 36 possible outcomes that result in a sum of 4. Therefore, the probability their total is 4 is:

P(S) =\frac{11}{36}=0.3056 =30.56\%

There is a 30.56% probability that their sum is 4.

6 0
3 years ago
How many exact tenths are in the number 679.354?​
siniylev [52]

it's probably 679 whole tenths

5 0
3 years ago
Other questions:
  • 7x^2-2x+1-(9x^2+2x-1)
    5·2 answers
  • In a class of 60 students 8 will be left handed. If a class includes 20 lefties, estimate how many students are in the class.
    5·1 answer
  • What is a common multiple of 3,4,5 and 6?
    7·2 answers
  • What is 78/126 in simplest form
    5·1 answer
  • Write 63000 in standard form
    14·2 answers
  • A line passes through the point (6,-5) and has a slope of -5/2.
    9·1 answer
  • Use the diagram to find the solution to 4 + (–7) Captionless Image 4
    15·1 answer
  • Based on the work shown on the left, what is the
    13·1 answer
  • Which is equivalent to log Subscript 2 Baseline n = 4?
    9·2 answers
  • checking account a charges a montly service fee of 3 and a per check fee of .02 while checking account b charges a montly servic
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!