If the reciprocal of the sum of the reciprocals of \frac{3}{5}, \frac{5}{7}, \frac{4}{9} is \frac{p}{q} when p, q are positive integers with {GCD} 1, then 3 q-5 p=

TS ICET 1 Oct 2020 Shift 1 Paper

Question : 87 of 200

Marks: +1, -0

If the reciprocal of the sum of the reciprocals of

{3}/{5}, {5}/{7}, {4}/{9}

{p}/{q}

when

p, q

are positive integers with

{GCD} 1

, then

3 q-5 p=

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