If a_ 1 , a_ 2 , a_ 3 _____ and b_ 1 , b_ 2 , b_ 3 _____ are A.P., and a_ 1 = 2, a_ 10 = 3, a_ 1 b_ 1 = 1 = a_ 10 b_ 10 , then a_ 4 b_ 4 is equal to-

JEE Main 2022 Mathematics question

If , , and , , are A.P., and , , , then is equal to-

Answer: (4)

gives and gives . The common difference of the is − 2)/9 =

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Question ID VK-034511