Question: 25
(Choose 1 answer)
(See picture)
A. (i)
B. (ii)
C. (iii)
D. (iv)
The harmonic numbers Hj, j = 1, 2, 3, . . ., are defined
by H=1+
1 1
2 3
H(4) and H(k+1) are
(1)and 1+1+
1 1
2 3
k k+1
(ii)
(11) and 1+++++
25
2 3
11
k-1 k
(ii) and 12
(iv) 25 and
23 k+1 'k+2
1 1
1+1
2°3 k k+1
