If the p^ th , q^ th and r^ th term of a GP and HP are a,b,c, then a(b-c) a+b(c-a) b+c(a-b) c is equal to

JEE Main Mathematics question

If the , and term of a GP and HP are , then is equal to

Answer: (B)

As terms of a GP, are in AP at the places : . As terms of an HP, are in AP at the places with some difference :

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Question ID VK-021666