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Matrix transformation What matrix is used to change y = x2-1 into y = | x2-1 | is it necessary to segment
There is no such matrix transformation
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- 1. After the elementary transformation of matrix, is the original matrix equal to the transformed matrix? Why are they equal? Take R1 * 999 1 0 0 0 0 5 2 8 0 2 3 4 So a11 is 999,
- 2. Example: R is a reflexive relation on the set X. it is proved that R is symmetric and transitive if and only if There is a difference between a, b > and in R Example: let R 1 and R 2 be two equivalence relations in set a, and R 1, R 2 = R 2, R 1, R 2 is also the equivalence relation on a Proof: 1) reflexivity (omitted) 2) Symmetry (omitted) 3) Transitivity: If, then And, so, so And then by and by transmission, we get, Again by knowing, so, so, again by and is transmitted, get, and so Example: let R be a reflexive transitive binary relation on set a, and let t also be a binary relation on set a, and satisfy the following conditions: . prove: t is the equivalent relation on a
- 3. Let G be a simple connected graph with n nodes and N edges, and there are nodes with degree 3 in G. it is proved that there is at least one node with degree 1 in G
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- 5. The square roots of a positive number are 3x-5 and 8-6x. Find the value of X
- 6. 8:7 plus 2x equals 13:5 (simple equation) simple and slightly complex equation! Quick, I just need an answer
- 7. 18x-66=7x Is an equation. Find the formula
- 8. How to solve the equation 6.8x + 2.4x = 9.66 The equal sign should be aligned!
- 9. It is known that the product of the first three terms of the increasing equal ratio sequence {an} is 512, and the three terms are subtracted by 1, 3 and 9 to form the equal difference sequence. The general term formula of the sequence {an} is obtained
- 10. Given the line AB = 60cm, draw the line BC on the line AB so that BC = 20cm, point D is the midpoint of AC, and find the length of CD
- 11. What is the row exchange of a matrix?
- 12. Why is the matrix representing the transformation always placed on the left side of the transformed matrix in matrix multiplication
- 13. Matrix graphic transformation Let me ask a more professional question: when using matrix multiplication method to carry out graphic transformation, the order of each transformation matrix cannot be adjusted. However, how can I know which matrix is in the front and which matrix is in the back?
- 14. Discrete mathematics problem, let R be a binary relation on a, define s = {(a, b) | &; C ∈ a, (a, c) ∈ R, (C, b) ∈ r}, prove Let R be a binary relation on a, define s = {(a, b) | &; C ∈ a, (a, c) ∈ R, (C, b) ∈ r}, prove that if R is an equivalence relation on a, then s is also an equivalence relation, and S = R It's OK to connect~
- 15. How is the binary relation calculated? R1={(a,b),(c,d)},R2={(b,c),(d,e)} So R1 * R2 = {(a, c)}, R2 * R1 = {(B, d)} What do I think, R1 * R2 = {(a, c), (C, e)}, Because (a, b) (B, c) can get (a, c) (C, d) (D, e) can get (C, e)
- 16. In discrete mathematics, the definition of binary relation on set (a, B, c) and why it is transitive relation is related to their relation It doesn't match, it doesn't match the symmetry
- 17. Transitive relationship If the relation R is transitive on X, why is it arbitrary, What about ror? Please prove, I saw a question: Let R be a binary relation on set X, and prove that R is a transitive relation on X if and only if ror belongs to R. I see that the answer proves its necessity in one step: "if the relation R is a transitive relation on X, for any, "Ror", I just want to ask how this sentence is deduced,
- 18. Judgment of reflexive antisymmetric transitivity X = {1,2,3,4}. If r = {(1,1) (2,3) (2,4) (3,4)} on X, then r has () A: Reflexivity B: anti reflexivity C: symmetry D: transitivity
- 19. Transitivity R1 = {(a, b), (B, c), (a, c)}, R1 is transitive, and R2 = {(a, b), (B, c), (a, c), (C, a)} is this transitive? That is, there can be no redundant ordered pairs that can be reused?
- 20. The problem of set transitivity in discrete mathematics Let a = {a, B, C}, then the above relation R={,,,} S = {} is transitive Why are R and s transitive? Can r be understood as not meeting all the delivery possibilities?