Elementary operations of a matrix

Elementary Event

Elementary Event

By using elementary operations,find the inverse of the matrix A=[[1,22,-1]]

By using elementary row operations, find the inverse of the matrix A=[{:(3,-1),(-4," "2):}].

By using elementary row operations, find the inverse of the matrix A=[{:(3,-1,-2),(2,0,-1),(3,-5," "0):}].

By using elementary row operations, find the inverse of the matrix A=[{:(1,-2),(2," "6):}].