Simple operation of 0-1 matrix 1 0 1 0 1 0 What's the square of this matrix

Simple operation of 0-1 matrix 1 0 1 0 1 0 What's the square of this matrix

A^2=
2 1 1
0 1 0
1 1 1
If it is a Boolean operation, it is
1 1 1
0 1 0
1 1 1

Calculation of simple matrix
0 3 3
1 1 0
A = - 1 2 3 (matrix) given AB = a + 2B find B
Please write down the detailed process · (I have forgotten all) · thank you ha · (I have forgotten all)
It's a matrix of three rows and three columns···

(A-2E)B=A,
B = (a-2e) ^ (- 1) a, is the inverse matrix of a-2e right times a

There is no third-order matrix inverse matrix formula ah, direct point, in order to facilitate calculation

There is no formula for the inverse of a square matrix of order 3 or more
The reason is that it's too complicated. It's better not to

How to use matlab to realize this simple matrix calculation
How to make each element of each column subtract the first element of the column, and then sum each element. For example, the matrix is b = [1, 2, 3]
2 3 4
3 5 6]
The result should be equal to ans = [3, 4]

Directly input in the MATLAB window:
b=[1 2 3;2 3 4;3 5 6]
a=b(1,:);
for i=1:3
b(i,:)=b(i,:)-a;
end
sum(b)

Grade 4 Volume 2 vertical calculation 10
Urgent!

640÷80= 15×5= 23×3= 12×2×5= 480÷80= 16×5= 27×3= 90÷15= 48÷4= 640÷16= 39÷3= 24×20= 32×3= 48÷16= 12×8= 27×3= 56÷14= 24÷8= 14×2= 83－45= 560÷80= 96÷24= 40÷20= 40×30= 37＋26= 76－3...

Let (1 + x) + (1 + x) ^ 2 + (1 + x) ^ 3 + +(1+x)^n=a0+a1x+a2x^2+……… +Ax ^ n if a1 + A2 + +N = 30

a0=1C0+2C0+3C0+4C0+...+nC0
a1=1C1+2C1+3C1+4C1+...+nC1
a2= 2C2+3C2+4C2+...+nC2
a3= 3C3+4C3+...+nC3
.
an= nCn
This should be very clear ~ where A0 = n, an = 1
a0+a1+a2+a3+...+an=2+2^2+2^3+...2^n=2^(n+1)-2
Therefore, a1 + A2 +... + a (n-1) = 2 ^ (n + 1) - 2-a0-an = 2 ^ (n + 1) - 2-n-1 = 2 ^ (n + 1) - 3-N = 29-n
So the solution is n = 4

7x=0.12+4x

7x=0.12+4x
Transfer of items
7x-4x=0.12
3x =0.12
x=0.04

A barrel of oil weighs 6.25 kg. After half use, the barrel weighs 3.55 kg. How many kg does the barrel weigh

Suppose the weight of oil is XKG and the weight of oil in the barrel is ykG
Solve the equations x + y = 6.25
x/2+y=3.55
The oil weight x = 5.4kg, barrel weight y = 0.85kg

How to find the analytic expression of derivative function of F (x) = 2Sin (1 / 2x + 3 / 4 π)?

Hello!
This is a way to find the derivative of a composite function
F'(X)=2cos(1/2x+3/4π)*(1/2x+3/4π)'
=2cos(1/2x+3/4π)*1/2
=cos(1/2x+3/4π)

4X + 20 = 56

x=(56-20)/4
=9