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

/* code_begins */

{{{
a=matrix([[4,-1,-1,-1],[-1,4,-1,-1],[-1,-1,4,-1],[-1,-1,-1,4]])
a.inverse()
}}}

/* code_ends */

 * '''Solution by''': 
   * laiti apoorva, student,bit
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