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Fourth order inverse matrix First row Second row 11-1-1 Third row 1-11-1 Fourth row 1-1-11 Inverse matrix
When finding the inverse matrix of a matrix with elementary row transformation, that is to say, change the matrix (a, e) into the form of (E, b) with row transformation, then B is equal to the inverse of A. here (a, e) = 11110011 - 1 - 101001 - 11 - 101001 - 1 - 1110001, the second, third and fourth rows are subtracted by the first row 1111000
Three formulas of inverse matrix of elementary matrix
1 0 0 1 0 0
The inverse of K 10 = - K 10
0 0 1 0 0 1
0 1 0 0 1 0
Inverse of 100 = 100
0 0 1 0 0 1
1 0 0 1 0 0
The inverse of 0 3 0 = 0 1 / 3 0
0 0 1 0 0 1
Eij (k) inverse = eij (- K) eij inverse = eij EI (k) inverse = EI (1 / k)
Which brother will help me explain these three formulas
3q!
Eij (k) inverse = eij (- K)
It means that the I th row of the identity matrix is multiplied by K and added to the j th row
Eij inverse = eij
The two lines ij of the identity matrix are interchangeable, and its inverse matrix is itself
EI (k) inverse = EI (1 / k)
If the i-th row of the identity matrix is multiplied by K, its inverse matrix is the i-th row multiplied by 1 / K
English phrases and phrases related to Spring Festival
Spring Festival
Lucky money
visit friends and relatives
In triangle ABC, EF is parallel to BC, ad intersects EF with G. if eg is 2:5 To GF, BD is equal to DC
What is it
EF / / BC, triangle AEG is similar to triangle abd, eg / BD = Ag / ad = 2 / 5, triangle AGF is similar to triangle ADC, GF / DC = Ag / ad = 2 / 5, DC = 15 / 2 = 7.5
There is a knife on the desk
there are some knives on the desk
In △ ABC, if cosa = 3 / 5, SINB = 5 / 13, then sinc=
cosA=3/5
∵ 0
The little boy can tell stories ()the age of 3.
In, on, at
The answer is at
At the age of 3 = 3 years old
At is the fixed preposition of this phrase
The little boy can tell stories (at) the age of 3.
The child can tell a story at the age of three
I hope it helps you,
The school has built two cylindrical flower beds of the same size. The inner diameter of the bottom of the flower bed is three meters, and the height is 0.8 meters. If the height of the filling inside is 0.5 meters, how many squares of filling are needed for the two flower beds?
3÷2=1.5
3.14×1.5×1.5×0.5×2=7.065m³
What is the opposite of warm
Cool cool
In the triangle ABC, we know that 2B ^ 2 * sinc = (b ^ 2 + C ^ 2-A ^ 2) * tanb, and judge the shape of the triangle ABC,
2b^2*sinC=(b^2+c^2-a^2)*tanB=cosA*2bc*tanB
bsinC=c*cosA*tanB
sinBsinC=sinCcosA*sinB/cosB
cosA=cosB
A=B
Isosceles
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