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

/* code_begins */

{{{
Q=matrix([[1,0,0,0],[0.25,1,0,0],[0.33,0.33,1,0],[0.5,0.5,0.5,1]])
P=Q.inverse()
print P
}}}

/* code_ends */

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