Question

if pth term of an AP is 1/q and qth term of an AP is 1/p.show that the sum of pqth term is 1/2(pq+1)​

Answer 1

pth term = a +(p-1) d

qth term = a+(q-1) d

sum of pqth term = PQ/2(2a+(pq-1) d)

if u substitute the values and proceed u will get a linear equation