Sum of all subsets of a set formed by first n natural numbers | javascript program to find sum of all subsets of a set . ; sum of subsets is ( n * ( n + 1 ) / 2 ) * pow ( 2 , n - 1 ) ; Driven Program
function findSumSubsets ( n ) { return ( n * ( n + 1 ) / 2 ) * ( 1 << ( n - 1 ) ) ; } let n = 3 ; document . write ( findSumSubsets ( n ) ) ;