If a_1, a_2, a_3, , a_9 are in GP, then what is the value of the following determinant? vmatrix a_1 & a_2 & a_3 a_4 & a_5 & a_6 a_7 & a_8 & a_9 vmatrix

NDA 2021 Mathematics question

If are in GP, then what is the value of the following determinant?

Answer: (A)

Let the GP be . Then , so form an AP with common difference . Apply and :

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Question ID VK-033498