Question

Please help me with the question in the image that I have attached here.

Answer 1

Answer:

1/q + 1/s = 2/r

⇒ s + q/qs = 2/r

⇒ 2qs = r(s + q)

⇒ (p + r)s  =  r(s + q)

⇒ ps + rs  =  rs + rq

⇒ ps = rq

⇒ p/q = r/s.

therefore p:q::r:s

Hence  proved.