Plz explain how to solve dis... Q.3. ∑ k = 1 n k 1 + 1 n k - 1 = Share with your friends Share 0 Brijendra Pal answered this Hi, After expanding it will be S= 1+21+1n+31+1n2+41+1n3+..........+n1+1nn-11+1nS= 1+1n+21+1n2+31+1n3+.......+n-11+1nn-1+n1+1nnSubtracting, S1-1-1n= 1+1+1n+1+1n2+1+1n3+....+1+1nn-1 +n1+1nnNow, 1+1+1n+1+1n2+1+1n3+....+1+1nn-1 is a GP with a =1 and r = 1+1n-Sn=11+1nn-11+1n-1+n1+1nnS= -n2×1+1nn-1+n1+1nn 1 View Full Answer Chharishma.r.nayaka answered this These are d options 0