Find the Nth term of the series 14 , 28 , 20 , 40 , ... . . | Function to find the N - th term ; initializing the 1 st number ; loop from 2 nd term to nth term ; if i is even , double the previous number ; if i is odd , subtract 8 from previous number ; Driver Code
function findNth ( N ) { let b = 14 ; for ( let i = 2 ; i <= N ; i ++ ) { if ( i % 2 == 0 ) b = b * 2 ; else b = b - 8 ; } return b ; } N = 6 ; document . write ( findNth ( N ) ) ;