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

/* code_begins */

{{{
U=matrix([[4,4,8,8,],[0,1,2,2],[0,0,2,6],[0,0,0,2]])
U.determinant()
A=U.transpose()
A.det()
B=U.inverse()
B.det()
U.swap_rows(0,3)
U.swap_rows(1,2)
U.det()
}}}

/* code_ends */

 * '''Solution by''': 
   * <Monica>, <Student>, <SNIST>