||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 5th Edition ||

/* code_begins */

{{{
a=matrix([[1,1/2,1/3],[1/2,1/3,1/4],[1/3,1/4,1/5]])#coefficient matrix
c=a^-1 #inverse if matrix a
b=matrix(QQ,[[1,0,0]]) #defining the constants matrix
d=c*b.transpose()
print d
}}}

/* code_ends */

 * '''Solution by''': 
   *Praveen Kumar,Student,IIT Roorkee