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
brilliants [131]
3 years ago
9

The nine squares of a 3-by-3 chessboard are to be colored red and blue. The chessboard is free to rotate but cannot be flipped o

ver. Determine the generating function for the number of nonequivalent colorings and the total number of nonequivalent colorings.
Mathematics
1 answer:
nignag [31]3 years ago
3 0

Answer:

a_n = 2^{\frac{n^2-1}{4} + 1} + \frac{2^{n^2} - \, 2^{\frac{n^2-1}{4} + 1}}{4}

For n = 3, there are 134 possibilities

Step-by-step explanation:

First, lets calculate the generating function.

For each square we have 2 possibilities: red and blue. The Possibilities between n² squares multiply one with each other, giving you a total of 2^n² possibilities to fill the chessboard with the colors blue or red.

However, rotations are to be considered, then we should divide the result by 4, because there are 4 ways to flip the chessboard (including not moving it), that means that each configuration is equivalent to three other ones, so we are counting each configuration 4 times, with the exception of configurations that doesnt change with rotations.

A chessboard that doesnt change with rotations should have, in each position different from the center, the same colors than the other three positions it could be rotated into. As a result, we can define a <em>symmetric by rotations chessboard</em> with only (n²-1)/4 + 1 squares (the quarter part of the total of squares excluding the center plus the center).

We cocnlude that the total of configurations of symmetrical boards is 2^{\frac{n^2-1}{4} + 1}

Since we have to divide by 4 the rest of configurations (because we are counted 4 times each one considering rotations), then the total number of configutations is

a_n = 2^{\frac{n^2-1}{4} + 1} + \frac{2^{n^2} - \, 2^{\frac{n^2-1}{4} + 1}}{4}

If n = 3, then the total amount of possibilities are

a_3 = 2^{\frac{3^2-1}{4} + 1} + \frac{2^{3^2} - \, 2^{\frac{3^2-1}{4} + 1}}{4} =  134

You might be interested in
Please help giving Brainiest!!
Firdavs [7]

Answer:8 shaded in size 1/4 the area 1/2

Step-by-step explanation:if wrong sorry.

8 0
2 years ago
Hannah read 14 fewer pages than she was assigned to read. She reads 60 pages. Write and solve an equation to find how many pages
Setler79 [48]

Answer:

60+14=p

Step-by-step explanation:

If this helped you please rate this comment, give it a like, and maybe mark it as branliest!

7 0
3 years ago
What is the ratio of blue shapes to all shapes in the set below?<br> 5:9<br> оооо<br> 04:5<br> 5:4
Anit [1.1K]

Answeri don't get the equestion your trying to say

Step-by-step explanation:

5 0
3 years ago
A runner finished his marathon in 180 minutes. A marathon is around 26 miles
Bezzdna [24]
7 minutes per mile so around 2.5 miles
7 0
2 years ago
Read 2 more answers
I really need help...And soon!
Kruka [31]
There you go!
If you can't see it clearly just let me know









4 0
3 years ago
Other questions:
  • How to write 325809 in expanded form
    9·2 answers
  • Write one or two sentences to describe the cost function for the Wichita factory. (5 points)
    13·2 answers
  • Solve for b.<br> 5<br> b<br> 8.<br> b= ✓ [?]<br> Help please
    6·1 answer
  • If you and a friend get a job painting houses for a summer job. You can paint a room
    6·2 answers
  • Which point on the number line shown would represent the fraction 3/20?
    15·1 answer
  • Can someone please answer?
    8·2 answers
  • 13-6=3x-14 whats the value of x
    5·1 answer
  • Which proportion can be used to solve for f in the figure above?
    14·1 answer
  • The tile showen are placed in a bag you randomly select one of the tiles return it to the bag and randomly selecting Lo tile wha
    5·2 answers
  • 15 points help! Select the correct answer from the drop-down menu.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!