Question

solve the third one...​

Answer 1

Answer:

r(p+q)/2

Step-by-step explanation:

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Answer 2

$\sf\boxed{\underline{\huge{\rm{Solution:}}}}$

$\sf{We\:have,}$

$\rm{52\: pqr (p+q) (q+r) (r+p) ÷ 104\: pq(q+r)(r+p)}$

= $\rm\dfrac{52\:pqr(p+q)(q+r)(r+p)}{104pq(q+r)(r+p)}$

= $\rm\dfrac{52\:pqr(p+q)(q+r)(r+p)}{2×52×pq(q+r)(r+p)}$

= $\bf\sf\dfrac{1}{2}r(p+q)$.