![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
How to prove the multiplication rule of block matrix? Who can write down the proof process, or take photos and upload it
The multiplication rule of block matrix is defined. As long as the requirement of block is satisfied (the number of columns of left multiplication matrix is equal to the number of rows of right multiplication matrix), the multiplication of general matrix is OK
How to prove the rationality of matrix block multiplication
This definition should be able to prove, but it involves the disassembly of summation minus sign. The process is very complicated, and there is no technical content, so we should be careful. This property can be used directly, and we should pay attention to the corresponding number of rows and sequences of blocks
Right handed spiral law
Is the direction of the thumb S-pole or N-pole? Is the direction of the thumb the direction of the current?
The direction of the thumb is N-pole
The bending direction of the four fingers is the direction of the current
RELATED INFORMATIONS
- 1. Why are there left-hand spiral rule and right-hand spiral rule?
- 2. The left hand rule and the right hand spiral rule What rules are used under what circumstances? What do the four fingers, thumb and palm of each rule represent? What changes do the left and right hands follow? Under what conditions can the rules be formed?
- 3. What are the advantages and disadvantages of online market research methods compared with traditional market research methods?
- 4. What are the characteristics of traditional culture and art reflected in Sanwang tomb? What kinds of traditional cultural features does the novel of three kings' tomb reflect? What are the artistic features? ------------------------------------------------------------------------------------------------------- If you have a son, you will kill me. If you have a son, you will say, 'go out and look at the Nanshan Mountain, pine on the stone, and the sword is on its back.' "so you are about to see the king of Chu, One male and one female. If the female comes, the male will not come Moxie's son was named Chi and stronger than Hou. He asked his mother, "where is my father?" his mother said, "your father made a sword for the king of Chu in three years. The king was angry and killed him. When he went, he told me: 'Yu Ruzi: go out and look at the south mountain, the pine grows on the stone, and the sword is on his back.'" so he went out and looked south, and there was no mountain. But he saw the pine pillar in front of the hall, and the stone is low above it. He broke his back with an axe and got the sword Wang dreamt of a son with a wide eyebrow. He said he wanted revenge. The king bought his daughter. When he heard of it, he died. When he went to the mountains, he sang (11). When the guest met (12), he said, "my son is young. Why do you cry so sad?" he said, "I'm a good general and moxizi. When the king of Chu killed my father, I want to repay him!" the guest said, "I heard that the king bought his daughter's daughter, and brought his son's head and sword to repay him." the guest said, "fortunately!" he committed suicide, holding his head and sword in both hands, Li Jiang (13). The guest said, "I will not bear the son" (14), "so the corpse is a servant (15) The guest held his head and went to see the king of Chu. The king was very happy. The guest said, "this is the head of a warrior. It should be cooked in a soup pan (16)". As the king said, the first three days and three nights of cooking are not rotten. The head comes out of the soup (17), and the eyes get angry (18). The guest said, "this head is not rotten. May the king come to see it "The king is coming." the guest imitates the king with his sword (19), and the king's head falls into the soup. The guest also imitates his own head, and his head falls into the soup again. The three pieces are all rotten and can't be identified. They are buried separately in the soup and meat, so they are called "three kings' tomb". Now they are in Yichun county (20) -----------------------------------------------------------------------------------------------------------
- 5. How to determine the direction of the vector from the product of two vectors?
- 6. How to determine the direction of the outer product of a vector!
- 7. The problem of normal vector The normal vector of space surface, add a negative sign before the vector, or the normal vector of the point? How to judge the positive and negative direction?
- 8. In the basic theorem of calculus, is continuous = integrable?
- 9. The difference between economic law and Commercial Law
- 10. A (cos23, cos67) B (cos68, cos22) finding the vector product of ab
- 11. It is known that square matrix A of order n satisfies A2 + 2a-3e = 0. It is proved that a is invertible and the expression of inverse distance matrix of a is given
- 12. How to prove that only square matrix can have inverse matrix
- 13. The process of proving the formula of 2 times 2 inverse matrix algorithm A = ad-bc of D B = - ad-bc of B C = - ad-bc of C D = ad-bc of a,
- 14. How to solve inverse matrix of fourth order matrix
- 15. How to express the assignment to a vector after the multiplication of 2 × 2 matrix and two-dimensional vector in MATLAB?
- 16. Find the existence of the great spirit of Linear Algebra B, make the matrix ab-ba = a, and prove that a & # 178; = 0
- 17. Linear Algebra -- what is the relationship between positive definite quadratic form and semi positive definite quadratic form For example, is a positive definite quadratic form also a semi positive definite quadratic form? Why? X1 ^ 2 + x2 ^ 2 + X3 ^ 2, for any real vector x, x ^ tax > = 0, is it also a positive semidefinite quadratic form?
- 18. How to define row minimalist matrix?
- 19. Is the rank of row ladder matrix equal to the final row simplest matrix? Is the rank determined by row ladder or row simplest
- 20. Matrix A m × n, matrix X n × 1, M