My level is very elementry. Tell my pleses how to do it. Thankyou. I actully have only 400 ponits that allow me to ask aquestion.
If D is 4 times 1 matrix, E is 2 times 3 matrix and F is 1 times 3 matrix, then the size of DFF if it exists, is 2 times 3 1 times 4 4 times 2 The matrix D = (1 7 0 9 0 1 0 3 0 0 1 2 0 0 0 0) is in Reduce row echelon from (rref) Row echelon form (ref) Neither The product of D and E, where D = [1 3 -4], E = (0 0 1 2 -3 3 1 -1 10) is [2 -5 -30] [1 9 0] [9 -5 -30] If D = Dt, D = (2 a b 2a 0 a + b 3 3 b). Then a and b are 1 and 3 -1 and 5 0 and 3
Show transcribed image text If D is 4 times 1 matrix, E is 2 times 3 matrix and F is 1 times 3 matrix, then the size of DFF if it exists, is 2 times 3 1 times 4 4 times 2 The matrix D = (1 7 0 9 0 1 0 3 0 0 1 2 0 0 0 0) is in Reduce row echelon from (rref) Row echelon form (ref) Neither The product of D and E, where D = [1 3 -4], E = (0 0 1 2 -3 3 1 -1 10) is [2 -5 -30] [1 9 0] [9 -5 -30] If D = Dt, D = (2 a b 2a 0 a + b 3 3 b). Then a and b are 1 and 3 -1 and 5 0 and 3