If a, a1, a2, a3, ..........,a2n, b are in AP and a, g1, g2, g3, .....................g2n, b are in G..P. and h is the single harmonic mean of a & b, then
\(\frac{a_1 + a_{2n}}{g_1g_{2n}} + \frac{a_2 + a_{2n-1}}{g_2g_{2n-1}} +........+ \frac{a_n + a_{n+1}}{g_ng_{n+1}} \)
(a) \(\frac{2n}h\)
(b) 2nh
(c) nh
(d) \(\frac nh\)
