Finding the inverse matrix of matrix a {1 2 3,2 2 4,3 4 3}

When we use elementary row transformation to find the inverse matrix of a matrix, that is, we use row transformation to change the matrix (a, e) into (E, b), then B is equal to the inverse of A. here (a, e) = 123100224010343001, the second row subtracts the first row * 2, the third row subtracts the first row * 31231000 - 2 - 2 - 2100 - 2 - 6 - 3

A is the first row 200, the second row 001, and the third row 01x of the matrix. B is the first row 200, the second row 010, and the third row 00-1 of the matrix
Find the value of X

The second column and the third column of a matrix exchange positions, so that the third row of a matrix and the third row of B matrix are equal. So x = 0

2-2. Matrix A = the inverse matrix of the first row (1, - 4, - 3), the second row (1, - 5, - 3) and the third row (- 1,6,4) is ()?

-2/5 34/5 27/5
-1/5 7/5 6/5
1/5 -2/5 -1/5

Let matrix A = the first row 1, - 1,0, the second row 0,1,1, the third row 0,0,1, find the invertible matrix

1 -1 0 1 0 0
0 1 1 0 1 0
0 0 1 0 0 1
1 0 1 1 1 0
0 1 1 0 1 0
0 0 1 0 0 1
1 0 0 1 1 -1
0 1 1 0 1 0
0 0 1 0 0 1
1 0 0 1 1 -1
0 1 0 0 1 -1
0 0 1 0 0 1
So for
1 1 -1
0 1 -1
0 0 1

It is known that 7a-8b = 3, a + B = 1, using decomposition factor to find the value of (3a-4b) (7a-8b) + (2a-5b) (8b-7a)

(3A-4B)(7A-8B)+(2A-5B)(8B-7A)
=(7A-8B)(3A-4B-2A+5B)
=(7A-8B)(A+B)
=3

40 degrees 30 minutes + 30 degrees 30 minutes 30 seconds = 180 degrees - 90 degrees 35 minutes 42 seconds=

40 degrees = 60 minutes * 40 = 2400 minutes = 2400 * 60 seconds = 14400; 30 minutes = 60 seconds * 30 = 1800 seconds; one question = 14400 + 1800 = 16200 seconds; 180 degrees = 60 minutes * 180 = 60 seconds * 10800 = 648000 seconds; 90 degrees = 324000 seconds (see the 180 degree operation process divided by 2); 35 minutes = 60 seconds * 35 = 2100 seconds; two questions = 64800 + 32400 + 2100 = 99300 seconds

4x ÷ 4 / 21 = 14, simple calculation and process are needed to solve the equation

4x △ 4 / 21 = 14
4X=14x4/21
4 X=8/3
X=2/3

How to calculate 0.125 / (3.6 / 80) * 0.18

0.125/(3.6/80)*0.18
=0.125*80*（0.18/3.6）
=10*0.05
=0.5

In the triangle ABC, the opposite sides of angles a, B and C are a, B and C respectively, and C = three fourths of π, Sina = √ 5 / 5, find the value of 1, cosa and SINB
2. If AB = 2 √ 2, find the value of a and B (mainly the second question mark)

(1) sinA=√5/5 C=3π/4 cosA=2√5/5 A+B=π/4 sinB=sin(π/4-A) =√2/2(cosA-sinA) =√10/10(2) a/sinA=b/sinB=c/sinC a=bsinA/sinB=(b*√5/5)/(√10/1...

Write down the 2006 natural numbers from 1 to 2006 in turn, and get a multi digit number 123456789101112 twenty million fifty-two thousand and six
What is the remainder of this number divided by 9

The remainder of a number divided by 9 is the same as the remainder of the sum of its digits divided by 9,
Therefore, the remainder of this multi digit number divided by 9 is the same as that of 1 + 2 + 3 +.. + 2006,
1+2+3...+2006=2006*2007/2=1003*9*223
So the number of bits divided by 9 is 0

Finding the inverse matrix of matrix a {1 2 3,2 2 4,3 4 3}