IPMAT Indore 2019 (MCQ) - There are numbers a_1, a_2, a_3, , a_n each of them being +1 or -1. If it is known that a_1 a_2 + a_2 a_3 + a_3 a_4 + a_n-1 a_n + a_n a_1 = 0 then | PYQs + Solutions | AfterBoards
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IPMAT Indore 2019

Algebra
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Progression & Series

Medium

There are numbers a1,a2,a3,…,ana_1, a_2, a_3, \ldots, a_n each of them being +1+1 or −1-1. If it is known that a1a2+a2a3+a3a4+…an−1an+ana1=0a_1 a_2 + a_2 a_3 + a_3 a_4 + \ldots a_{n-1} a_n + a_n a_1 = 0 then

Correct Option: 3

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