||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
A1= matrix([[0,0,0,1],[0,0,2,0],[0,3,0,0],[4,0,0,0]])
print A1.inverse()
print "\n"
A2= matrix([[1,0,0,0],[-1/2,1,0,0],[0,-2/3,1,0],[0,0,-3/4,1]])
print A2.inverse()
print "\n"
var('a,b,c,d')
A3= matrix([[a,b,0,0],[c,d,0,0],[0,0,a,b],[0,0,c,d]])
print A3.inverse()


}}}

/* code_ends */

 * '''Solution by''': 
   * <g.ramya>, <student>, <hcu>
   * <Thoyajakshi>, <student>, <hcu>