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Let a1, a2, a3,.... be an A.P. with a6 = 2. Then the common difference of this A.P., which maximises the product a1 a4 a5, is :

(1)   3/2

(2)   6/5

(3)   8/5

(4)   2/3

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Best answer

Correct option  (3)  8/5

Explanation:

first term = a

Common difference = d

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