||'''Book'''|| Linear Algebra ||
 ||'''Author'''|| Gilbert Strang ||
 ||'''Edition'''||  ||

/* code_begins */

{{{
var('a,b,c,d')
A1=matrix([[0,0,0,1],[0,0,2,0],[0,3,0,0],[4,0,0,0]])
A2=matrix([[1,0,0,0],[-0.5,1,0,0],[0,-0.66,1,0],[0,0,-0.75,1]])
A3=matrix([[a,b,0,0],[c,d,0,0],[0,0,a,b],[0,0,c,d]])
Q=A1.inverse()
W=A2.inverse()
R=A3.inverse()
print Q
print W
print R
}}}

/* code_ends */

 * '''Solution by''': 
   * guna,student,snist
   * sadhana,student,snist
   * sai kumar,student,mriet