Question

11. If H is the harmonic mean between P and Q the value of
H/P+H/Q
is
(a) 2
(b) PQ(P+Q)
(d) None of these​

Answer 1

Answer:

hey mate.......

h=2ab/a+b

hence, h=2pq/p+q

h/p=2q/p+q........(1)

also, h/q=2p/p+q.........(2)

adding (1) and (2)

h/p + h/q=2(p+q)/(p+q)

=2