Identity Matrix

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Questions

• What is an identity matrix?
• How do I find the additive identity matrix?
• What is the identity matrix for subtraction?
• What is the identity matrix of size 4?
• What does an identity matrix do?
• What is the identity matrix of a #2xx2# matrix?
• What is the identity matrix of a #3xx3# matrix?
• How do I find the identity of a matrix on a graphing calculator?
• What is a unit matrix?
• How to determine whether a matrices are in echelon form, reduced echelon form or not in echelon form ?
• Question #f6f93
• Question #bdbc2
• Prove that #(1+sinh2A+cosh2A)/(1-sinh2A-cosh2A)=-cothA#?
• What is the dimension of the matrix #[(3 ,4 ,5 ,6 ,7)]#?
• What is the dimension of the matrix #[(10,-6,18,0), (-7,5,2,4), (3, 11,9,7)]#?
• What is the dimension of the matrix #[(6,-1,5),(-2,3,-4)]#?
• What is the dimension of the matrix #[(7),(8),(9)]#?
• What is the dimension of the matrix #[(0,0,8), (6,2,4),(1,3,6), (5,9,2)]#?
• What is the dimension of the matrix #[(-3,17,-22),(9,31,16), (20,-15,4)]#?
• What is the dimension of the matrix #[(17,-2,8,-9,6), (5,11,20,-1,4)]#?
• What is the dimension of the matrix #[(16,8), (10,5), (0,0)]#?
• Question #baea9
• If #[(5,x), (y,-6)]=[(5,-2), (9,-6)]#, what what is x and y?
• Let #A=((0,1),(0,1))#. Let T linier operator to#R^(2x2)#, and #T(X)=AX-XA#, #AAX##inR^(2x2)#. Determine #rank(T)# ?