Using elementary transformations, find the inverse of matrix [2174], if it exists.
Using elementary transformations, find the inverse of matrix [2142], if it exists.
Using elementary transformations, find the inverse of matrix [31027], if it exists.
Using elementary transformations, find the inverse of matrix [4534], if it exists.
Using elementary transformations, find the inverse of matrix [2513], if it exists.
Using elementary transformations, find the inverse of matrix [6−3−21], if it exists.